no-brainer

A task or action that requires little or no effort to complete.

“It’s a no-brainer!”

by Photonbeam September 20, 2019

No brainer

A person who refuses to do or reciprocate oral sex.

Laura: Does Jake give good head?

Payton: I wouldn’t know, he’s a no brainer so he’s never gone down on me.

by Happy Gilmer November 11, 2018