While performing cunnilingus, the vagina is blown into, loading it up with a pocket of air. The performing party then grabs the woman's ankles and separates them in a manner resembling holding the handle bars of a low-rider motorcycle. The resulting queefs resemble the sound of a chopper.

Additionally, the ankles can be twisted for that extra bit of immersion.

An offensive insult made toward a Portuguese person.

The "West Coast" part refers to the fact that Pork-chops come from the west coast of Europe.

The "Chopper" part is short for pork-chop, another derogatory term towards Portuguese people.