take the plunge

Related to take the plunge: more the merrier, raring to go, on a roll, pillar to post

take the plunge

1. To commit oneself to a course of action that is momentous or challenging. I'd been putting it off for years, but I finally took the plunge and enrolled in a college course. After spending 10 years as a junior partner, Karen is taking the plunge and starting her own law firm.
2. To commit to marriage. We'd been living together for three years and we already had a son together, so we decided it was time to take the plunge!
See also: plunge, take
Farlex Dictionary of Idioms.

take the plunge

to marry someone. I'm not ready to take the plunge yet. Sam and Mary took the plunge.
See also: plunge, take
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

take the plunge

Venture something, commit oneself, as in You've been living together for a year, so when are you going to take the plunge and get married? It is also put as make the plunge, plunge alluding to diving in a body of water. [Mid-1800s]
See also: plunge, take
The American Heritage® Dictionary of Idioms by Christine Ammer.

take the plunge

COMMON If you take the plunge, you decide to do something that you have been thinking of doing for some time, even though it is difficult, risky, or unpleasant. Helen decided to take the plunge and turned professional in 1991. Finally, Mona took the plunge. `I have something to tell you,' she said.
See also: plunge, take
Collins COBUILD Idioms Dictionary, 3rd ed.

take the plunge

commit yourself to a course of action about which you are nervous. informal
See also: plunge, take
Farlex Partner Idioms Dictionary

take the ˈplunge

(informal) decide to do something new, difficult or risky, especially after thinking about it for some time: After working for twenty years he’s decided to take the plunge and go back to college. OPPOSITE: get/have cold feet
A plunge is an act of jumping or diving into water.
See also: plunge, take
Farlex Partner Idioms Dictionary

take the plunge

tv. to marry someone. I’m not ready to take the plunge yet.
See also: plunge, take
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

take the plunge

Informal
To begin an unfamiliar venture, especially after hesitating: After a three-year engagement, they're finally taking the plunge.
See also: plunge, take
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • put (oneself) on the line
  • put yourself on the line
  • put neck on the line
  • put your neck on the line
  • put (one's) neck on the line
  • kick oneself
  • kick yourself
  • wash hands of
  • wash your hands of
  • wash your hands of somebody/something