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1. nice guy, but
A phrase used in conversation to offset an insult of an absent third party. The phrase is often used as a passive-aggressive way to distance oneself from the insult that follows.

note: can also be used in the feminine.
Mo: My roommate is a nice guy, but he smells like cat piss and he's always stealing my shit!

Lester: You got that right, friend.

...

Ari: She's a nice girl, but she farts all the time and has corn-lookin' teeth!

Ola: Word.

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