a.k.a lovebite or hickie,a mark similar to a bruise, normally found on someones neck, caused by somebody else,sucking hard on the skin. (normally a sexual act by done by a lover) given the name slagtag because if you have one some people may consider you promiscuous.
Just look at Vikki Raymonds neck. the size of those slagtags! she obviously gets around
my boyfriend gave me this slagtag yesterday cause he wants everybody to know i'm taken by him