When you masturbate really hard to send yourself to sleep.
When you masturbate really hard because you hear a noise from the building you're in but have to finish.
To conciously make a descision to not masturbate for a set period of time for religious reasons.
1) Bob fasturbated the week before his trip to Costa Rica for fear that God would down his plane if he didn't.
2) Oh, it's good Friday? I better fasturbate.
The quick and painless act of masturbating in a time period of less than 5 minutes. Usually applies to young middle school students with a small penis and a weak sense of longevity. Can be good for breaks between classes and/or in class.
"Jebus, I really hope that the teacher doesn't catch me beatin' the meat, because I am terribly ashamed of my small penis. What if she laughs at me! Well, I guess i better fasturbate to make it quick!"
Judy: "Oh Steven come down on me!"
Steven: "Well, we have 10 feet till we get to the pick-up window to get our food. Can you fasturbate with me?"
Judy:"Oh yes! That would be lovely!"