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.
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.
When you're about to cum but the video has like two minutes left and you want to cum in sync with the video so you slow down and wait a little bit, then finish big.
Man, last night when i was masturbating i was about to cum then i noticed my video had a minute left, so i had to masturwait until the guy came all over the chick.
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!"
Fapping while you're watching porn but you're waiting because the video's buffering.
Due to my slow internet, I had to masturwait.
While waiting for a game to load, a download to finish or computer to turn on, you masturbate to kill the time.
The 50 second wait between round of Battlefield 3 were a good time to masturwait.
When you masturbate while waiting for someone
Person A: Hey, When are you coming over?
Person B: In about two hours.
Person A: Ok I will have a masturwait
Person B: ewww, You didn't need to tell me that.
Person A: Meh