look up any word, like blumpkin:
 
1.
a girl with a good looking face but is short (under 5'4") and has a real fat ass
hey, check out that cute chunk-a-dunk
by lespaulnutz November 26, 2004
 
2.
An overly obese person.

A person with a large amount of fat on their body.
"Oh my gosh Michelle, you're larger than life! You're such a chunkadunk!"
by Kain July 01, 2004
 
3.
Take a dump
I really need to chunk a dunk after eating that taco
by 40oz killa October 23, 2008