Best definition
Using the bathroom of a Burger King instead of a vehicle for “hotboxing.” The exhaled smoke and the smoke coming

from the joint, unable to escape, circulates and thus is breathed in and is not wasted. Smokers in a Whopbox may find themselves totally fucked beyond the point of speech after about 20 minutes. Whopboxing is popular in the midwest, and refers to the “whopper” for its namesake.

1: “Let’s go for a joyride.”

2: “Bruh, I’m hungry. Let’s go whopboxing instead.”