Noun. The rounded (or often flat in the less fortunate) protrusion of the human body's posterior region. References the body part commonly referred to as the buttox, rear, ass, booty, bottom, badonkadonk, tush, tushy,junk in the trunk, seat, backside. Acceptable terminology for ears of very young or very old age.
"Sit on your tucchus"
"I wouldn't climb on that, you'll fall flat on your tucchus!"
"I'd LIKE TO pinch Mike's sweet tucchus"