A set of breasts (or occasionally one breast) on a woman that are distasteful or awful in quality - be it in shape, size, color, or texture.
Yikes! That troll over there eating garbage has quite a set of gnar bags, I think they are inducing the premature birth of my child. Whoops! Its a still-born. Thanks troll.
by mrgnfnx February 16, 2009
Holy shit dude, that Buckethead show was total gnarbags!!!!!!!!!!!
by jakeforthewin October 29, 2008