standing for “disciplinary punishment”, in gang slang a DP is when a gang jumps their own member, expecting them to take the beating, in response to fucking up (often in prison)
X didn’t back me up when i got jumped in the pen, we finna dp him when he get out
dick pic - to send someone a photograph of your ‘sausage’
Dude: hey want a dp
Person: umm pass
Dude: alri
Person #1: Dude, look at my new hat!
Person #2: Man, that hat's a total DP.
Person #1: What's DP??
Person #2: Dip Shit, you asshole.