Takes a whore to catch a whore - Kima, Season 2, about McNulty.
You need a Day of the Jackal-type motherfucker - Avon to Stringer, Season 3, when Stringer wants Slim Charles to assassinate Clay Davis.
That's good. That's like a 40-degree day - Stringer, Season 3.
Day at a time, I suppose - Omar, Season 2, testifying at Bird's trial.
Those are some of the ones that make me laugh. Here are some of the ones that break my heart:
You gonna look out for me, Sergeant Carver? - Randy, Season 4.
Come on, now. A man don't be shedding no tears - Michael saying goodbye to Bug, Season 5.
What you do, what you do? - Bubbles upon learning Sherrod is dead, Season 4.