lump ass 

When a girl has a wallet, phone, pack of cigarettes, etc. in the back pocket of her tight-fitting jeans, thus causing an odd protrusion from her butt.

Jamie: Man, if that girl is gonna wear such tight jeans she better upgrade to a smaller phone!
Christina: Yeah, shes got some seriousss lump ass!

lump ass by Nathan T April 1, 2008

ass lump

A lump found on the ass area of the body. Usually the result of to much anal intercourse.

Jimmy has an ass lump.

ass lump by fatassfag January 25, 2005

lumpass 

Any one who uses his or her ass to confine charcoal in order to prevent people from stealing it.

My charcoal is in my lumpass, you cant have it.

lumpass by James F. Casey December 30, 2003

Lumpass 

When u have a lumpy fucking ass

Sarah u have lumpass

Lumpass by Daddyraddy May 2, 2018