1 definition by Thom Ascott
Similar to a shoehorn but instead of being used for slipping on tight shoes, it is used to stretch tight pants over fat bodies.
Damn, Addison, did you see that chick with the cake top? (See cake-tops: exceeding "muffin-tops") She must have used a butthorn to get into those jeans
by Thom Ascott December 22, 2015