former

a shadow of (one's) former self

Someone or something that has changed dramatically to become decreased in vivacity in some way, often following negative circumstances or some traumatic event. Ever since Tim was in that accident, he's been a shadow of his former self. She's so quiet now, like a shadow of her former self. Does anyone know what happened to the bubbly girl we once knew? Many of the town's residents moved away, leaving it a shadow of its former self.
See also: former, of, shadow

be a ghost of (someone's or something's) former self

To be weaker or inferior in comparison to how someone or something was previously, often due to negative circumstances. After suffering from a prolonged illness, Sharon was a ghost of her former self. This town is a ghost of its former self after so many of its residents have moved away.
See also: former, ghost, of

be a shadow of (someone's or something's) former self

To be weaker or inferior in comparison to how someone or something was previously, often due to negative circumstances. After suffering from a prolonged illness, Sharon was a shadow of her former self. This town is a shadow of its former self after so many of its residents have moved away.
See also: former, of, shadow

become a shadow of (someone's or something's) former self

To become weaker or inferior in comparison to how someone or something was previously, often due to negative circumstances. Suffering from a prolonged illness caused Sharon to become a shadow of her former self. This town became a shadow of its former self after so many local businesses closed down.
See also: become, former, of, shadow
Farlex Dictionary of Idioms.

*shadow of oneself

 and *a shadow of itself; *a shadow of one's former self
Fig. someone or something that is not as strong, healthy, full, or lively as before. (*Typically: be ~; become ~.) The sick man was a shadow of his former self. The abandoned mansion was merely a shadow of its old self.
See also: of, shadow
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

shadow of one's self

Also, shadow of one's former or old self . A person, group, or thing that has become weaker in physical or mental capacities or in power or authority. For example, After that long battle with the flu, he was just a shadow of his old self, or This new administration is but a shadow of itself, or The revised constitution is a shadow of its former self. The use of shadow for an emaciated person dates from the late 1500s, and by about 1800 the word began to be used for other kinds of attenuation.
See also: of, shadow
The American Heritage® Dictionary of Idioms by Christine Ammer.

a shadow of your former self

FORMAL
COMMON
1. If someone or something is a shadow of their former self, they are very much less powerful or impressive than they used to be. Our ninety-year-old dad was but a shadow of his former self. But the side which played such thrilling football last season now looks a shadow of its former self.
2. If someone is a shadow of their former self, they are very much thinner than they used to be. I couldn't believe how much weight she'd lost — she's a shadow of her former self.
See also: former, of, shadow
Collins COBUILD Idioms Dictionary, 3rd ed.

be a shadow/ghost of your/its former ˈself

not have the strength, influence, etc. that you/something used to have: He’d been ill for some time, and he looked a shadow of his former self. The old house, which had once been so full of life, was now just a ghost of its former self.
See also: former, ghost, of, shadow
Farlex Partner Idioms Dictionary

shadow of one's (former/old) self, a

Reduced or diminished, in vigor or size by age, illness, or fatigue, or in wealth or power. This term was a hyperbole for being emaciated as long ago as the sixteenth century. Later it was used for other kinds of reduced circumstances, as by Sir Walter Scott in Guy Mannering (1815): “He appeared to wither into the shadow of himself.”
See also: of, shadow
The Dictionary of Clichés by Christine Ammer
See also:
  • a shadow of (one's) former self
  • a shadow of (one's) old self
  • a shadow of (oneself)
  • a shadow of your former self
  • selves
  • shadow of one's self
  • shadow of oneself
  • became
  • become a shadow of (someone's or something's) former self
  • be a ghost of (someone's or something's) former self
References in periodicals archive
According to Nepal Samacharpatra daily, the former King didn't celebrate his birthday in public due to the demise of his relatives.
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The also EBM approved filing corruption reference against Gul Hassan Channa, former Secretary R and S, EP , board of Revenue Sindh, Iftikhar Haider, former MD Karachi Water and Sewerage Board.
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He, however, notes that government is in search of the legal provision that will back the action if it gives benefits to former Vice President Boakai.Mr.
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Porter Goss--Former Director of CIA, Former Chairman of House Intelligence Committee
| Former physiotherapy |technician Lyn Sexton and Ian Pearce, a civil servant, from Merthyr who won PS1m.