The act of masturbating under one's bed or in one's closet with the intent to frighten.

the act of texting people while you are pooping

to pleasure yourself while drinking a Monster energy drink.

When you jerk off so hard that its scary but it feels so good that you wanna squirt EVERYWHERE!

To being jerked off really hard and vigorously.

When someone jerks off to pics of monsters, mostly erotic monster pics.

The act of playing with one's monster unit in an app game in the restroom. At times, it is also done in public. It is a very vulgar act. Stroking, fingering, touching, and aiming are various ways in which one can play with their monster. At times, one can monsterbate furiously and come out not knowing how much time has passed.