say a lot about (something)

say a lot about (something)

To be very indicative of something. Anyone can be a gracious winner, but the way you handle yourself when you lose says a lot about your character.
See also: lot, say
Farlex Dictionary of Idioms.

it, etc. says a ˈlot, ˈmuch, etc. about/for somebody/something (that...)

something reveals a lot, etc. about somebody’s/something’s qualities, personality, etc: It says much about the high quality of these instruments that many of them are still in use today. The kind of car you drive says a great deal about you.
See also: say, somebody, something
Farlex Partner Idioms Dictionary
See also:
  • it, etc. says a lot, much, etc. about/for somebody/something
  • say a great deal about (someone or something)
  • say for
  • say (something) for (someone or something)
  • a straw will show which way the wind blows
  • help (oneself) to
  • help to
  • work (oneself) up
  • oh my goodness gracious
  • don't strain yourself