Stoprock

Little rocks on the ground that launch you off your skateboard.
They stop a wheel from turning which usually results in the person on the board eating shit (not literally).
Similar effect as wheelbite.

Jimbo dropped in on the quarter pipe and went 10 feet before he hit a stoprock and got launched off his board.

Stoprock by wwolfe October 25, 2010

Stopcock 

What you want to do with a shemale to keep her penis in its zipper.

The shemale is going to fuck you with that if you don't put stopcock to good use.

Stopcock by Solid Mantis September 6, 2018

stopcock 

Device in Chemistry or other science classes to restrict or allow the flow of liquid in a lab. However in OLCHS it is now the funniest word at the time. It is used in anyway that fits. Mostly used around immature teens such as myself.

Hey watch your stopcock its getting that liquid everywhere.

stopcock by itsame May 25, 2004

stopcock 

Someone who inhibits another person's game, thus lowering his or her chances to beat it up. Synonym of cock block or baller block.

George: "Hey honey. I have a favor to ask you."
Sally: "Anything for you, dear."
George: "Yeeeeah...so...would you mind putting a good word in for me with your little sister? I saw her sitting by the pool the other day in her bikini, and DAAAAAMMMN was she lookin' fine! I'd give anything to tear that ass up!"
Sally: "George, I'm your wife!"
George: "OK, fine, I'll let you hold the camera. While you're at it, tell your friend Tammy to come over too. I'd love to get her lipstick on my dipstick."
Sally: "Well I never!"
George: "Oh come on, honey, stop being such a stopcock! Hey, where's my dinner?"

stopcock by Nick D October 11, 2005