1 definition by harlequingirl hazel
An extremely unattractive singer of Fall Out Boy that look surprisingly like a cockroach. Also has the smallest penis in recorded history. Terrible singer. In a little nutshell, a wentzbag is a douchebag except worse.
Girl A: Did you hear what Tommy did?
Girl B: I know, he's such a terrible Wentzbag.
Cow: That goat is so mean.
Sheep: Yeah, he's a Wentzbag.
Girl B: I know, he's such a terrible Wentzbag.
Cow: That goat is so mean.
Sheep: Yeah, he's a Wentzbag.
by harlequingirl hazel March 20, 2010