Sneak up on one cheek
To discreetly fart while in a crowded place.
"If I sneak up on one cheek, hopefully no one will hear me fart."
sneak cheek
The lower most portion of the booty.
She was just sagging out with her sneak cheek.
sneak-a-cheeks
Shorts that allow the bottom portion of the butt to be exposed. Sometimes ill-fitting, but can be intentional and really quite lovely for the observer.
Do these sneak-a-cheeks look good on me? My boyfriend said he loves how they look, but I think he's really just looking at my drop bottom.