PUMS Stands for someone "A girl usually" Who is both "Pissed Up" and a "Massive Slag".
"Pissed up" being used to describe the
fact she he actually Hot, and usually smashed on Lambrini.
and
"Massive Slag" being used to tell you mates how she is a slag, just because you, in
reality, dont have a chance, or that she likes
cock, and this is pubic knowledge.
It enables you to CODE that someone is Pissed Up Massive Slag.