When a girl, and occasionally a guy, is wearing a top that makes their breasts pop out the top as a muffin pops out of the top of a pan.
Dang... that guy's got a muffin chest that is larger than your girlfriend's!
by babMuatangGT March 20, 2009
1 more definition
The feeling in your chest when you eat a muffin or bread too fast.
ugh, i ate that banana bread too quickly and now i have muffin chest
by a.house March 04, 2007