Top Definition
Cunnilingus when the girl is on her rags(period). the aftermath is having period all over your mouth. creating a rainbow of colours and a terrific after taste.
you could'a told me your mum was on her rags last night, i went the growl and ended up with a rainbow pash
by callum thomson September 23, 2006
10 Words related to rainbow pash
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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