The theory that if a girl likes marmite, she swallow after giving a blow job, and if she doesn't like marmite she'll spit.
'So I was getting head from Mary last night, but she doesn't like marmite so the end was a real buzz kill. Damn the marmite theory!'
by Joeh! January 03, 2013
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.Buy the mug