Someone who consumes an excessive amount of MDMA on a regular basis as part of their night out. They will usually gurn like a lunatic and be completely unaware of their surroundings, often listen to old school, hardcore or cheesy anthems and wearing a shell suit
"I hate going to festivals there is always a bunch of Northern pill monkeys, half of which are on the rob to spoil it for everyone else"
The name given to people that consume large quantities of pills such as ecstasy at dance parties/raves.
Jimmy bought a packet of ecstasy and munched them down like a true pill monkey.