Armpit Tit 

The fold under a morbidly obese male's armpit that extends to the back.

Fat man: "Has anyone found the remote?"
Skinny man: "have you looked under your armpit tit?"
Fat man: "yeah, but I only found this half eaten sandwich!"

Armpit Tit by Muckleash November 23, 2014

Armpit Tits 

Big boobs that look great, but when said female lays on her back, her boobs sag off of her chest into the axilla.

Instead of a steep canyon of excellent cleavage, armpit tits will slope off the chest and resemble small rolling hills.

Excessive sternum

"Bro, That chick last night night was wild, but found out she had armpit tits when we went back to her place!"

Armpit Tits by longnights51 February 9, 2012

armpitties 

When a girl is on her back naked and her titties fall to the side and reach her arm pits

I hooked up with girl last night she an an amazing ass but the worst set of armpitties.

armpitties by ilovemtndew March 31, 2014

Armpitties 

Breasts (male or female) that originate from the armpit region instead of the chest where they should be. Not limited to folds under the arm- often times, the areola will be there too. Occurs on older big women, natural asymmetries and botched boob jobs.

Bryon: "Dang, that girl has armpitties!"
Kim: "And that's why she can't put her arms down!"

Armpitties by Partners in crime June 16, 2016

armpitting

Rubbing one's penis inside a someone's armpit.

Only weirdos practice armpitting.

armpitting by SomewhereElse September 24, 2016