It pertains to heavy Canadian women. When a female is on all fours and you eat their box from behind and tickle their sagging belly between their thighs.
I got that chick down to eat her box and her belly sagged, so I gave her the Canadian Tickler and she couldn't stop giggling.
An obscure kink in which one partner performs articulate maneuvers and/or gestures on an other partner's foreskin with intimacy. Hence, that first partner is now a foreskin tickler.
Allen: So, Luis, how was your night with Carson?
Luis: He's such a foreskin tickler, dude; I woke up the following morning and my wee-wee hood was raw.