When a particularly large man engages in sex with a unusually small woman and completely engulfs her in his body, while at the same time sweating profusely and making loud grunting noises. During the act of a Sweaty Nelson the man must constantly spill dip spit or intentionally put used chewing tobacco on the participant, it may even be used as a lubricant.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life