Birthday poo 

A clean break after dropping anchor in poo bay, thus negating the need to wipe one's arse.

Pete: There's no need for a new bog roll yet, Dave.
Dave: How so?
Pete: Just had me a birthday poo!
Dave: Congratulations!

Birthday poo by Zapp83 April 16, 2009

Birthday poop 

The absolute best, as in more emphatic than "the shit".

You see that dope new Britney Spears video, bro? Yo man, that was birthday poop!

Birthday poop by McArr October 28, 2009

birthday poon 

Getting laid or having intercourse on one’s birthday

Man I really hope I can get some birthday poon

birthday poon by crazyfrog2998 February 9, 2019