fuck knots 

A condition that causes tangling of the hair, most often by very vigorous sex.

After a three day sex and crystal meth binge, I had a bad case of fuck knots.

fuck knots by nervous_farter April 20, 2003

Fuck knows 

An abbreviation or slang used to by many for a way to say "I don't know"

Boy1: Dude, what's the time?
Boy2: Fuck knows

Fuck knows by Dalmas January 2, 2014

fuck knot 

The funky knot that occurs in the back of a girl hair (assuming its long) after too much missionary position sex.

I'm gonna need a rake to get this fuck knot outta my hair :D

fuck knot by delusi0n December 5, 2004

fuck-knot

A tangled mat of hair in the central region of the back of the head. Most commonly displayed by human females after missionary style intercourse, the knot occurs from impassioned head thrashing on the pillow, bed, floor, kitchen counter, etc.

She had a big ol fuck-knot when she got to work this morning, I'm jealous of her morning wood wake up call.

fuck-knot by ZillahRae February 20, 2009

Fuck Knows 

The true usage of the phrase is to claim that you simply 'do not know', however, the phrase is often interpreted as 'Fuck Nose' which may cause offence to the listner. This mis-interpretation is often replied to using 'Cunt Face' which is regarded as the appropriate answer.

"What time is Adam supposed be be here?
"Fuck Knows"
"Only asking...Cunt Face"

Fuck Knows by Mystick Havok January 21, 2008

fuck knows when 

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.

fuck knows when by Tom_NZ May 14, 2007

Fuck Knows o' Clock

An unknown time of day. Can be past, present or future.

Hey Jack when are we leaving?

"At approximately ...fuck knows o' clock. Tomorrow."

What time is it?
"Fuck knows o' clock. Get a watch."

When did you fall asleep?
"Um, at fuck knows o' clock. I don't know!"

Fuck Knows o' Clock by HyperLynx September 22, 2016