Very large, lumpy buttocks with the appearance of being molded from large scoops of cottage cheese. Spandex does much to liberate and define the 'chunk' in many chunk butts.
Wow, look at that chunk butt walking across the street. (I first heard this in the mid-80's in Los Angeles, and that is an exact quote.)
by Jascal February 25, 2006
by spewer February 09, 2003
by salter January 27, 2003
by Benjamin April 29, 2003
by Teken March 31, 2006
a rocky brown substance, similar to crystalised ginger, that once expelled from the anus causes a sharp pain in the recipient's eye
by Anonymous June 11, 2003
Whilst fucking a girl in the anus you penetrate the membrane between the anus and the vagina and impregnate that bitch!
I was fucking Tashiqua in the ass last night and this morning she told me that I was butt chunking her, now I need to pay for the abortion.
by chunker222 January 27, 2009