A definition my teacher, Mr. Twichell used, to call Nick a hypocrite.

Yes, it's pretty much just calling someone a hypocrite.
Real conversation:
Nick: Shut up. You're so annoying.
Twichell: Nick, you're a pot calling the kettle black.
Nick: What does that mean?
Twichell: No, Natalie it's not racist. Nick, it means you're a hypocrite.
by YoItsNat March 1, 2017
u know what it means...
what happened when Paula Abdul told
Kady Maloy (of American Idol 7)
"you have some pitching problems..."

That is "pot calling the kettle black"
by vouguey February 24, 2008
Something about racist weed or some shit, I don't know.
Pot: Hey, black kettle!
Pot-smoking bystander: Hey, man. Make peace not war, man.
Kettle: Well, if that isn't the pot calling the kettle black?
UrbanDictionary.com reader: WTF?!! THIS DEFINITION SUCKS BALLS!
by SpaceMouse April 17, 2010
This is an idiom with Spanish origin that states that the person you are talking to is calling you something that they themselves are equally as guilty of doing... Thus an example of psychological projection.

This comes from old times when pots and pans were generally black and kettles were generally metallic and reflective. Therefore the pot sees its black reflection in the kettle and thinks that the kettle is black.
Sydney: you always cheat in any card game we play; all you care about is winning
John: Pot Calling Kettle Black!
by nomusclerussell September 25, 2017