The noise made when smiling which causes the saliva in your cheeks to pop in your cheeks. Usually can be heard when your bed partner is laughing at your in the dark.
A fart (usually in public) tried to be kept silent, by leaning to one side, and squeezing the butt cheeks together. However, failing to be silent, but instead of being a full blown butt trumpet, turns out to be a long winded high pitched squeak. Also causing it to be WAY funnier/more embarassing.
*Dude, Tom leaned over in classtoday and totally let out a half-cheek-squeak. It sounded like someone opening a balloon!*
A rarely used sexual maneuver employing the acts of fellatio, masturbation, and wound-fucking all in one. The squeeky cheek is performed by gently stabbing a hole into the facial cheek of a willing participant, forcibly shoving the thumb and index-finger portion of the 'OK' symbol into the oral opening, then proceeding to make sweet love to the cheek wound. Doing so, one will, by default, receive a blowjob, while also technically masturbating through the thumb-index finger ring inside the receiving party's mouth.
She was once a beautiful woman, before I gave her the Squeeky Cheek. Now she's just downright sexy!