Trunk lite Share definition Flag 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. Dude! I found 2 trunk lite’s in the car. Let’s get this party started. Trunk lite by Must Stank November 29, 2017 0 0 Get merch Get the Trunk lite mug. Buy Now — $32.95 See more merch