When you take a break from work (or play) specifically to have a wank.
If you lot are going out for a smoke, I'm fucking off for a masturbreak. See you back here in 5 minutes.
I am being sacked from my job because apparently I take "too many" masturbreaks. WHERE'S MY HUMAN RIGHTS?
I had been writing my essay for a solid 35 minutes when I thought "fuck it, you've earned a masturbreak by now, you fucking hero".