(v.) to add additional gasoline to the gas tank even though the gas tank container is full. People do it to get the most bang for their buck, to have more gas in their car. This action can be dangerous and it is prohibited by most gas stations. Most gas station attendants do it anyway to sell more petroleum.

A term used to reference cannabis/marijuana/weed.

Ejaculation into a vagina twice in a row

When you're already full, but you keep picking at your food and eating.

Having one person after another poop in a toilet till the point where the poop mountain peaks just above the rim of the toilet.

Topping you off is referred to as topping off someone else's dookie.

The expression "top you off" can also be said to mean something of the same, metaphorically, as a joke.

pooping in someone else's butt