underbreastimate

to underestimate the size and/or weight of ones breasts.

be careful not to underbreastimate a women's tits; they are known to suffocate small animals and children!

by Matt Huff October 7, 2011

underbreastimate

the act of underestimating the size of your boobs when trying on clothes

Girl: "I saw this really cute shirt and it looked like it would fit perfectly, but my boobs were practically popping out. I underbreastimated big-time"

by thatsdebateable2014 June 7, 2011