look up any word, like dirty sanchez:
 
1.
a shortened version of "disrespect"
Why you be dissin' me?
by AYB February 17, 2003
 
2.
Verb. Slang word that came from, and therefore shares the same definition as "to disrepect".

To lack respect.
Stop dissin' me or I'll kick your ass!
by DMC-12 October 14, 2006
 
3.
A form of disrespecting someone, their homies, or thier mama.
Don't diss on me, cause you aint me.
by Radriguez October 25, 2005
 
4.
Taken from the word “disrespect”. To insult someone disrespectfully.
For example:

Jim: “Sally, you’re a whore.”

Sally: Don’t diss me, Jim. I’ll beat yo ass.”
by Tsunami Lu March 19, 2009
 
5.
A scam or process of getting free publicity by annoying hacks who have no discernible talent by pretending to have a feud among each other. This is used predominantly in the corrupt "music" industry, especially by those who cannot play a musical instrument.
"This letter is sent to inform you that our song entitled ‘Sup' is currently being submitted to numerous radio stations under false pretenses, and is being misrepresented by the writer, Mr. Fo D. Rapp, an artist under the Cellmate Records label who has been dissing us since before the song was even written."

"Tune in to Fauxtainment tonight a 7 and hear about the rumor of how Jay-East dissed ParaShoot, and ParaShoot disses back!"
by Truth in Door Knobs January 14, 2011
 
6.
A small market town in Norfolk inhabited mostly by the elderly and chavs.
'Dude, have you been to Diss? Its full of old people and chavs.'
by eyenbead August 25, 2011
 
7.
Diss, in hiphop community, is one rapper singing against someone else.
Also called beef, or roast beef.
beef
'Hey nigga, have you heard that awesome diss from Mc.Tommy?'
'The one against Mc. New York? Yeaah. maaaaan.'
by Tommy Bazar June 26, 2007