Cunnilingus while the woman is on her period.
This is followed by an open mouth kiss which is ideally bloody.
Adam: I think i might be a vampire!
John: Why would you think that?
Adam: Jill requested I perform a rainbow pash on her last night and i quite enjoyed it.
Adam: Stop biting my neck!
by van_tango January 16, 2008
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a rash u get if u pash way 2 fuckin much
OH my god! Check out your pash rash, that is so wrong!
by CUT THE CHEESE December 14, 2004
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A forceful pash (tounge kiss, french kiss, snog), usually without consent.
"I was at the club last night and this guy rape-pashed me. It was awful."

"I rape-pashed this girl last night. She slapped me."

"I would never rape-pash a girl. It's so tacky."
by TheScotsman May 3, 2008
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A forceful pash (tongue kiss, french kiss, snog), usually without consent.
I was drinking last night and this girl pash raped me.

I feel so violated, this crazy girl pash raped me.
by mpnz June 8, 2010
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A kind of mini-fail. Can be used as a kind of british version of "douche bag".

Also just shortened to pash can be used to describe someone being a bit of an idiot.
Luke: why dont we get a maccy d's breakfast?

Ali: Pash bag.

*its 3pm*

OR

*scott attempts to slam dunk an item of litter into a open topped bin*

*scott fails and manages to miss the bin even though it was mere milimetres away when it left his grip*

Ali: Pash bag fail.
by UK Foamy May 18, 2010
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Noun- a kiss in the back of a taxi on the way home from a party or night out.
"Did you hooking up with Ian after we left the club?" "Nah... just had a little taxi pash and he dropped me home"
by dxbdxb December 11, 2015
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Water splashing up so fiercely from the tpilet bowl due to defecating, that it penetrates your butthole.
I dumped a log so solid it gave me a fierce poseidon's pash.
by BrownDoggyDog April 7, 2018
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