Used as a euphemism for Sex. Sexy sexy sex. Particularly between Arthur and Merlin. Term is used primarily as an excuse when others catch Merlin and Arthur in the act. Rarely works as everyone knows exactly what "poetry" Merlin is teaching Arthur.
Quebecer 1: Eyy, kes tu fait calisse?!?!
Quebecer 2: Ferme ta crisse de geule, t'est t'une crisse de pute!!
Quebecer 1: QUOI?!?! Mot'Petayeul osti!!!
Quebecer 2: Tu m'Petayeul?1?!?!? HAHA!! C'est moé qui va t'Petayeul CALISSS!!!