in Europe in the olden-days...

if a man wanted to sleep with a woman and she says "no" he can go to the king and if he says it is okay, the woman HAD to sleep with the man.

Fornication Under Consent of the King=FUCK
--"dude i fucked 5 girls this weekend!"

--"you mean fornication under consent of the king?! wow i can't believe he said yes!"
by lesley_roo January 30, 2008
Get a Fornication Under Consent of the King mug for your brother-in-law Paul.
Otherwise abbreviated to spell "fuck"
Baby, I think we're ready to move our relationship to the next level, and we can Fornicate Under Consent of the King
by TheLoneCommando117 October 21, 2017
Get a Fornicate Under Consent of the King mug for your bunkmate Vivek.
this is the expanded abbreviation of the word or slang term which is FUCK.
a long time in England, one would need to get 'consent' from the king, if a couple would ever want to have sex or have a child (this is not including nobility or royalty)
man:"Lets have a child"
Woman: "But first we must get 'fornication under the consent of the king.
use that next time you want to swear :D
by rachell09 January 22, 2009
Get a Fornication Under the Consent of the King mug for your brother Callisto.