What is Fuck Knows When?
1.
To exclaim that you don't know when an incident will happen.
Wife: When are you comming home?
Husband: Well I've got all this paperwork to do. I won't be back till fuck knows when.
Neighbour: Oh, you're looking for Steve? He's gone on holiday, won't be back until fuck knows when.
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1.
When a man is receiving oral sex, he takes his (substantial) scrotum and flattens it all over the fellator/fellatrix's face. Much l..
