cheek block
When one goes in for a kiss on the lips and is met with a sudden head-jerk motion by the kissee resulting in lip to cheek contact as opposed to the intended lip to lip. Usually used as a signal meaning, "I am not interested."
Whoa! Sorry, Bro, I saw you goin' for the kiss, but that bitch straight up cheek blocked you! She just wasn't feelin' it.