k-west finger bump - When your partner sticks their fingers up your butt without

When your partner sticks their fingers up your butt without you saying yes or even noticing.

I was taking a shower and my girlfriend gave me a k-west finger bump. I almost slipped and fell.

He did a k-west finger bump during a movie. I almost laughed out loud and ruined the scene.

I was eating pizza when my boyfriend gave me a k-west finger bump. I threw the crust at him.