Top definition
A guy who's estrogen fueled pointers stick out further than their tum. Usually permanent, sufferers may experience the 'cleavage stare' and become molested on 'grab a boob day'. Not fatal, just socially embarassing.
'OMG Paul that guy is pumped but still has a persistent case of the Tiddy-boo. Poor guy, I might buy him some protein'

'Dave mate, protein won't save him they'll just enter the cone stage'

*Whistle*
by Jimmy the hat. March 03, 2010
Get the mug
Get a Tiddy-boo mug for your guy Sarah.