What's on your mug?

To squeeze a girl's butt cheek as you would a nerf ball.(Vigorously)

Levi just nerfed Sabrina's ass!

By Van-T

to lower the strength, experience, or any attribute of a certain character in any MMORPG via patching. The word originated from Star Wars Galaxies (Sony online entertainment, Lucas Arts). By Ryan Nero and Rob Preusse. As a joke they invented several words in game and were curios to see if they stuck.

"They totally nerfed the XP in groups...", "My mage got soooo nerfed on the last patch!"

By TheDudeofRude

cheap fleshlight

i stuck my wiener in that nerf football.

By The Pat Masta Flex

to make something in a videogame less desirable

I started to grow tired of Pokémon when they nerfed the attack system. (example of nerf)

By The Return of Light Joker

To leave or pass on unfinished, undocumented or poorly thoughout work for another coworker.

John is going to Nerf Steve when he quits and Steve takes over his projects.

By JookyDFW