To french-kiss, kiss with tongue,
snog,
pash, etc. Often
doubled (lep-lep) to mean "have sex with", or used as an adjective (lep-able) to describe someone good looking.
It comes from the word leap, with the idea being that you jumped on someone -> leaped someone -> lepped someone
Areas used: Ireland and Northern Ireland
Ruth: Did ya
lep him last night?
Lisa: Yeah, but we didn't lep-lep or anything
Ruth: Why, do you not think he's leppable?
Lisa: Yeah, he's leppable, but I've just met him. Soon though!
Ruth: Lucky thing -
I'm dying for a lep-lep