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5.
Contraction of the words "Big One"

A large, heavyset woman who does not realize her size so she walks so heavily that the ground shakes.
Damnit! The Bigun must have returned home!
by MacWolfGrubs March 20, 2011
6 2
 
1.
Large Breasts - (Big Ones)Popularized by Al Bundy on Married With Children was also the name of a fictitious magazine on that show.
Damn! She's got some Biguns
by Gunnyman August 01, 2006
57 8
 
2.
Large breasts.
"The babe at the mall had some big 'uns!"
by x January 22, 2003
60 18
 
3.
large tits dd cups ( 4-hook backstrap bra )
Babe U have some real nice big uns !!!

Let me hook ur big uns bra. Last hook is hard to get.
by itichie_nocanpo July 24, 2006
40 15
 
4.
Very large breast, tits, boobs ect.
Look at those biguns.
by Deep Blue 2012 August 10, 2009
14 5
 
6.
Larger than 38dd cup
hey bro! check out the BIG'UNS on her.
by Truman (Slut Puppie) Maltbie January 28, 2008
6 2
 
7.
big un: a girl that is big or overweight. cane from the magazine big uns. but big un translates to a girl that is just big! and not a girl with big uns (breast size)
look at that girl crossing the road (fat) shes a big un
by big Lance August 07, 2006
24 22