A filler phrase used mostly in response to a question due to the lack of an answer or lack of interest.
While on Brohouse, in the early days of just the OGs, PlayaSlaya was overheard talking to his mom's boyfriend Jim. The question he was presented with was "What kinda pizza you want Tom?"
PlayaSlaya's response in a mono-tone douchebagey voice was:
"I dunno...like a supreme?"
Person A: "Is that game any good?"
Faggot: "I dunno like a supreme?"