Masterlock 

Poorly made shit for shit lock. There are several ways to unlock it without picks. It's possible and extremely easy to make a shim out of a soda can and unlock it.

Jack thought his bike was secure with his Masterlock, but the next day someone guessed his combination in 3 minutes and rode off into the sunset.

Masterlock by A man in a suit October 10, 2005

masterlock 

A virtually indestructable lock, made from various metals for the ultimate protection.

I wish i was a masterlock, so everyobdy would love me.

masterlock by opio twinkletoes March 17, 2004

Mastylock 

When ones main hand becomes stiff and starts to twitch out of control. Chronic masturbation is the leading cause of this common teenage male disease.

Symptoms:
Sudden urge to relieve one self
Bulging fore-arm muscle, with inverse proportion to the opposite fore-arm.

If one finds another person/persons with "Mastylock", it is highly recommended to stand back and then state clearly who currently has it and what it is.

Warning: Staring at someones "Mastylock" can sometimes cause the looker to catch "Mastylock", depending on ones sexuality.

"Oh my god Kieran has Mastylock! Its when someone masturbates so much thier hand locks up!"

Jac is a faggot.

Mastylock by bob schumacer April 2, 2011

Masterlooser15

The best badass coder out there, who actually knows how to program in different coding languages, and even knows how to maintain his own cheat, x88Cheats! The best cheat out there which can easily win against anyone in a hvh.

When you call someone a MasterLooser15, you are telling them that they are a god at being a programmer.

Friend: "Hey Dude, look how good he is at programming!"
Me: "Whoa! He MUST be a masterlooser15."

Masterlooser15 by MasterLooser's wannabe friend. January 19, 2019

Masterfucked 

The superlative needed when "fucked" just isn't a good enough description.

"That midterm masterfucked the shit out of me."

Masterfucked by isteratter October 23, 2010

Masterbooking 

Hitting the "like" button on your own Facebook status.

Have you noticed how William always "likes" his own status? It's like he's masterbooking or something.

Masterbooking by lrchtr December 7, 2009

masterjack 

-the act of masterbating with extreme force and power.

-Porn is for learning not masterjacking.
-Baby, I want you to masterjack on my face.

masterjack by honkeyslayor December 9, 2008