It's a continuation of the popular game of "sticky biscuit" where men masturbate over a biscuit inserted in a lady's vagina. Except in this version the lady is on her period.
"Oh man, you missed a great game of jam on a biscuit last night. That menstruation sure tasted good"
by mumsnot July 9, 2014
Get the jam on a biscuitmug. by Baan the Guy June 19, 2016
Get the flesh biscuitmug. Oh man... someone left a nasty Bowl Biscuit in the shitter. I had better flush it down...
Turd Poo Dump Crap Shit
Turd Poo Dump Crap Shit
by Stank22 January 20, 2016
Get the Bowl Biscuitmug. 
A nugget of golden wisdom that someone graciously gives you from their mouth to your ears. Also to be exclaimed after dropping said knowledge biscuit.
"I just dropped a knowledge biscuit on your ass."
"Dude did you know Hitler had a huge farting problem? KNOWLEDGE BISCUIT!"
"Dude did you know Hitler had a huge farting problem? KNOWLEDGE BISCUIT!"
by iamahab April 15, 2012
Get the Knowledge Biscuitmug.