Boob sundae 

when a girl puts whip cream on her boobs and a cherry on top making her boyfriend eat it by licking it

Dude, my girlfriend gave me what i always wanted, a Boob sundae.

Boob sundae by michael513134 April 19, 2012

Sunder Boob 

The revealing of both the side and the bottom area of a womans breast.

"OMG! I can't believe I'm seeing both side AND under boob!!!!

"No, thats Sunder Boob!"

Sunder Boob by Pigliver July 19, 2009