Masturpainting 

The act of masturbating while painting a wall, or using your jizz to paint a wall.

Isaiah's mom caught him masturpainting in the bathroom.

Masturpainting by godlike823 June 10, 2011

masturpainting 

the art of masturbating while painting or using your cum to paint a wall

Ryan finished masturpainting the bathroom

masturpainting by jimmybot3 May 29, 2011

Masturwaiting 

Laying in bed, chubbed up, waiting for your roommate to go to sleep so you can pleasure yourself

"I had a Louisville Slugger-sized hardon last night and needed to crank one out, but my roomie was awake, watching some dumbass videos. I was up masturwaiting until 1:30am!"

Masturwaiting by DavieYo March 1, 2015

mathematically masturbaiting

The act of masturbaiting while looking at numbers. You can do this during math class, maybe while doing some math homework.

Joe: yo, what's nick doing?

Kevin: oh he's just mathematically masturbaiting. He's just trying to get that problem solved.. If ya know what I'm saying ;)

mathematically masturbaiting by Idek what I'm doing November 23, 2015

masterpainting 

When children masterbate at a young age, but they don't know what it's called, and so the teacher refers to it as 'masterpainting'

He's rubbing his boys on the carpet again...
He's masterpainting

masterpainting by frisknock November 15, 2013

masturwaiting 

Waiting for everyone in your house to go to sleep to spare having to hear them or them hear you while masturbating.

John: Why the hell are you so tired?
Bill: My brother wouldn't go to sleep, I was masturwaiting until like 2AM for fucks sake.
John: What the fuck is masturwaiting?
Bill: Check urban dictionary fag.

masturwaiting by pseudiddlyeudonymaaaaa August 14, 2010

masturwaiting 

The act of masturbating while waiting for a significant other to have sex with.

Alex was masturwaiting for at least 20 minutes before James arrived.

masturwaiting by orlando mun September 20, 2009