fuck knows
I don't know; nobody knows; it is unclear.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“Where he went, fuck knows.”
“I asked the manager when the project would finish, but he said fuck knows.”
“Why the system failed so catastrophically remains a mystery, and frankly, fuck knows how we will ever fix it.”
disputed origin
Probably a shortening of "who the fuck knows"
- 01
as far as one knows
To the best of one's knowledge, as far as someone knows or possible information to be gathered about the topic, subject, aspect, or situation.
- 02
as you know
as it is already known.
- 03
fuck if I know
I have no idea whatsoever
- 04
fuck it
An expression of great indifference or nonchalance.
- 05
fuck off
To go to hell; to disappear or go away; to screw oneself.
- 06
fuck someone upside down
To give someone a bad scolding.
- 07
fuck someone's brains out
To sexually penetrate (or be penetrated) in a vigorous but pleasurable manner.
- 08
fuck this
A dismissive expression of great indifference or nonchalance.
Last updated August 10, 2026