Was made in NY, and is now used almost everywhere.
Buns means to be soft, pussy, or to call something wack.
Can be mixed in with other words such as; if someone crossed you over in Basketball you would be called "Hot Crossed Buns". The way of using Buns is endless but dont forget where it came from, NY.
You--"Yo, i cant..."
Me--"Nigga you Buns"
"Yo this party is Buns"