Definitions by Dana jr.

titter 

titter is a verb. 'to titter' is the act of tits (boobs) flapping against each other.For men it is to mitter (man boobs=moobs).

Dude no1: Dude look at that tit-off.
Dude no2: That's some good tittering bro.

titter by Dana jr. June 3, 2015