slappynutz 

Serious sexual activity. Hardcore and very fast moving with the testicles slapping up against the "taint" area of the female from the seriously fast sex. Usually occurs the most during doggy-style or plain 'ol hyperspeed missionary.

Wow, me and Mandy were having some serious sex, slappynutz were in full effect and I had sweat just fallin off me and my balls. We must have lost 10 pounds each from that 45 minute sexual hurricane.

slappynutz by Schwagner December 7, 2006

slappynuts 

An extremely bastarsdous or cowarldy person

That friggen slappynuts pinched the bag

slappynuts by Krazy Kate August 27, 2006

SlappyMuttMutt 

Scary mofo, don't mess with him. He will **** you up.

Don't mess with SlappyMuttMutt!

SlappyMuttMutt by Allen Woods September 18, 2003

slapnutz 

n. a game in which the players attempt to catch each other by surprise by utilizing the back of the hand to strike each other in the scrotum.

Official rules of the game require players to verbalize the word "slapnutz" before making physical contact with other player's scrotum thereby giving notice, albeit short, of the intent to strike.

Often played at parties or other social gatherings and is especially embarrassing when played in the company a young lady that one of the players is attempting to tap.

Mark tagged in to the game of slapnutz, so his junk is fair game. He is such a tool bag.

slapnutz by G Quick July 8, 2009

Sloppynut Sunday 

The most important and cherished holiday in the fuckboy community, where a male can nut absolutely anywhere he wants without being ridiculed. Sloppynut Sunday is always the second Sunday of July.

Brent: Duuuude, hell yeah! It’s Sloppynut Sunday! YOU KNOW WHAT THAT MEANS.

Chad: DAMN STRAIGHT. Let’s go nut in that rude old woman’s petunias!

Sloppynut Sunday by Leader of Moth Civilization June 9, 2018

SlappyMuttMutt 

A very 1337 chater/hacker. Most of the time undercover not being noticed doing important work.

Dude, shut up, SlappyMuttMutt might be listening...

SlappyMuttMutt by Elliot Shend September 14, 2003