When one has an ass so large that Sir Mix-a-Lot wants to write songs about it; especially when seen walking and in combination with a small waist.
“I love the way she looks in those yoga pants; she’s got back.”
“Wow, he must work out those buns; he’s got back.”
“Wow, he must work out those buns; he’s got back.”
by anacondas_anon August 19, 2020

by pan and lil c April 23, 2006

In the Pilot Episode of Firefly (aired last by the same backbirths that cancelled it after less than a season) the "Purplebelly" Federal Agent sometimes called the "Mole" says, “Do you think I am a complete back birth?”
by —thoughtstorms— March 26, 2009

by M.R. July 13, 2003

Parent: why didn't you clean your room today?!?!?!
Me: I'm sorry! I had 6 hours of homework
Parent: Stop talking back!
Me: I'm sorry! I had 6 hours of homework
Parent: Stop talking back!
by PoppyCock. 8=D May 29, 2017

by ole ole ole ole ole October 1, 2010

by JennyMatrixDXM February 26, 2020
