a way to make fun of some one who's pissing you the fuck off!
boy: NANANANANANANAANANAN LOOO LOO LAA LAA AAAAAAAAAAHHHHHHHHH !

girl: shutthefuckup or ill diss you man.

boy: NONONONONONNONONON NANAANANANANA LALALAAAA !

girl: YOUR SO DUMB YOU SAT ON THE COUCH AND WATCHED YOUR TV MUTTHAAFUCCKKAA NOW STFU !

boy: ... :|
by none.of.your.BEESWAX August 08, 2009

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To put someone down.
"Hey, Flo, Dave's dissin street dance!"
"How dare he?!"
by countess-romanesque March 11, 2007

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when somebody says something bad about you to your face(or behind your back)
Dude I dissed you.
by Theodore Logan April 20, 2003

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a diss is when you want to have something from someone but you are turned away.or when you are interested in someone and he/she turns you away.it is like a rejection.
if you are looking for a job and you are dissed.when you are interested in a girl and she disses you.
by omar afifi August 09, 2006

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Usually followed by a series of OOOOOOHHHH BURN!!
dbag1:do you like anyone??
dbag2:yeah actu-
dbag1:OH really what's his name?
dbag2:YOUR MOTHER!!!!
OOOHHHHH
BURNN
dbag1:shuddp mothfucker, before i slap that 5 dollar haircut off your head
OOOOOO.diss.
by bfraj October 02, 2008

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The act of going over or slashing out someones graffiti.
Last night I totaly dissed this fuckin toy!
by ItagDeck April 27, 2008

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short for dysphemism
that is: an offensive or disparaging expression that is substituted for an inoffensive one
"You are such a spastic"
"Man, i just dropped the ball, no need to diss me
by Jason o]=< September 05, 2005

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