Any sound on water that makes a blooping type of sound. It is normally caused by a falling object perfectly striking and entering the water at an angle where it has the least friction.
1) Her dive off the diving board was so perfect that when she hit the water there wasn't really much of a splash only a monkey fart.
2) It was dark on the placid lake and completely quiet. Bored I started tossing rocks into the water underneath the full moon. Every time I threw a rock into the lake the only sound I could hear in the darkness was a monkey fart.
A sex position where a whale is on top of a monkey and he fucks the whale's buns while the monkey is on top of SpongeBob while he gets butt fucked by his SpongeKnob SquareNuts. Long story short, the monkey is in the middle.
Young Boy: ay what you be doing lately, monkey?
Santos and Son's: yo last night I was given a Monkey In The Middle
Young Boy: lmao this dude fuck sponges and whales get exposed