The act of taking a pillow and crawling between the box-spring and mattress of a twin-size bed. (Full, king, and queen mattresses are too heavy.) Lying on your back, positioning the pillow between you and the mattress, and thrusting your hips against the pillow. Beware — If someone walks in on you, you'll have a tough time talking your way out of this one!
a support group for blokes whose girlfriends have suffered improbable and ridiculous afflictions, such as knitting wrist, and of course the titular ham sandwich incident
amy sprained her ankle and was incapacitated for months because she slipped on a ham sandwich, so Frizzo formed the Ham Sandwich Club