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.
After you finish taking a dump and stand up to wipe and you get a blast of all that shitty smelling air right in the face.
Taking a dum..
1.
The Person you want to spend the rest of your life with, your soulmate.
From a Pon and Zi commic:
"Did you know that when a pengu..