Loose, thread-bare fabric sagging in the seat of one's shorts that jostles about like one took a dump in their trunks. Occurs mostly to folks with odd-shaped bods and who believe shorts don't need washing as often as other garments. Will usually smell like bus seat and fecal grease in affected region.
"Connor can't get the smell of skid marks out of his mouth since he bit into Perry's filthy dump trunks."
by Fauxby K February 21, 2020

A Lions Trunk is slang for a large clitoris. When her kitty has a big clitty it is referred to as a Lions Trunk.
by BadGremlin71 September 7, 2021

When one finds an old beer in their car trunk and drinks it. Preferably 6 months old or greater to be considered a trunk lite.
by Must Stank November 29, 2017

by partisan hack May 12, 2010

the thing you get when you leave unpasteurized Apple juice in the trunk of your car for several days in hot weather
I am so upset. That trunk cider I made last week left a huge mess in my car. The upholstery is ruined.
by Monkey484&4’didiekr October 10, 2018

The method where two individuals decide to have sexual relations in a trunk of a vechicle in which to conceive a child.
by BigNorthernCountryBoy1 August 14, 2016
