Very similar to hood rat
It is a guy from a ghetto part of town who fuck bitches all day and is basically a slut.
Also a kid who enjoys spending all day in homemade jean shorts, flannels and drinking 40s with their crew.
Yo man that kid is such a skid rat
Man those squamish skid rats are so muscly
A girl (often a medic / cook / campie) who has sexual relations with a constant stream of different oilfield workers. Basically, an oil patch slut.
Bob: I fucked that medic, Rose, last night.
Tony: I fucked her last Saturday, she's such a skid rat.