Drunk as a monkey
Monkey around
A barrel full of monkeys
Shock the monkey
Spank the monkey
Monkey see, monkey do
1000 monkeys & 1000 typewriters
Do the monkey (dance)
Porch monkey (in the Clerks2 sense)
Year of the monkey
Got a monkey on your back
Monkeywrench
Monkeynuts
Monkeybusiness