When somebody reaches down their pants, rubs their hand around on their privates and brings it back up to their nose for a sniff. Usually checking to see if their balls need a cleaning before going out for the night
Back in the late 90s in one of the geography classrooms of the Greensward School was a jungle scene. One of the animals drawn on purple paper was a monkey with a limp wrist. From that moment on homosexuals was known as purple monkeys.
A quick inconspicuous phrase to alert your friends of the pressence of a suspicious looking/acting character.
in other words - 'lets get out of here'
Out shopping with friends you notice a stranger eyeing off your handbags but your friends are too distracted to notice....
friend - "do you think this dress will look good with my red heels?"
you - "purple monkey dishwasher!!!!"
The act of smoking a cigarette and just before your done you light another cigarette using the cherry from the first cigarette then smoke the second one.