a throw
Each. A piece. You mean to tell me that these T-shirts are 50 bucks a throw? Sheesh! A: "How much did you guys contribute to Lucy's charity?" B: "Oh, $20 a throw, so hopefully she raised quite a bit of money."
oh dark hundred
In military time, a non-specific time in the early morning, before the sun rises. Why are we meeting at oh dark hundred? That's too early to do anything besides sleep!
keep it 100
slang To maintain authenticity and honesty. I always try to keep it 100 because life is too short to worry about what other people think.
the first hundred years are the hardest
A humorous phrase typically used as faux consolation, assuring someone that their life will get easier after they reach age 100. A: "Don't worry, honey, the first hundred years are the hardest." B: "And that's supposed to make me feel better?"