A dad joint is a joint that is poorly rolled possibly with one hand that is straight and not cone shaped. It might not look great but it still gets the job done in the end.
The twisted strands of toilet paper that get caught up in the cheesie crack hairs of a fat persons ass and fall to the back side of the toilet seat leaving behind These small twists of cheese tanted TP that resemble a joint!
I was going to use the public restroom but was quickly turned away by the site of a hugh smelly buttjoint laying on the seat!