The fontanelle, or soft spot on an infants head

extemely lazy tactic used by writers when they run out of ideas. basically it consists of having some kind of stupid event occur that sets everything back to zero. it's most commonly seen anime.

After eating to much, making yourself throw up by pushing the reset button.

A feline anus.

The result of heavy drinking the previous night. The act of taking a large poo, cleansing your lower intestines of any obstruction, resetting your bowels to their original empty state.

The intentional use of alchohol to aid in the evacuation of one's bowels.

On a TV show, when something happens that is significant enough that it should effect the characters and plot for several episodes (even seasons) to come but is quickly dismissed with some 'it never happened' plot device or completely forgotten by the next episode.

When Having vaginal sex in the doggy style position extremely fast and you slip out and your dick slides into her ass causing her to A: pass out from shock! B: jump across the room! C: scream! Or D: all of the above! This shares some similarities to the use and effects of reset buttons on tomagotchi's and other assorted digital pets!