A fork of Rural Dictionary
From Jamaican Patois. takes the word 'Gyal' meaning Girl. and 'Iss' which would be a variation of 'Ish'. A Gyalis is a guy that sleeps with a LOT of girls and doesnt care about it. Basically a Male whore, however to be called a Gyaliss guy-2-guy is sometimes seen as a compliment.
Someone who gets alot of girls easily
Damn ! Mark got the whole friend group. He a gyalis