A lady's fury-cup, originally from the cockney rhyming slang for 'fanny'. (it should be noted that to the English the fanny is a beaver not an arse.)
'Christ, she'd had a Brazilian on her Jack'n-Danny!'
by jiminski pallenov February 13, 2009
Self masturbation while your masturbating arm is interlocked with a partner who is also self masturbating.
It's not gay when you're Jack'n and Jill'n.
Jack'n and Jill'n is like a {dutch rudder}, but you don't need to wait your turn.
Jack'n and Jill'n is like a {dutch rudder}, but you don't need to wait your turn.
by Try Hard Anon June 07, 2016