Firmly grasp it!

The act of stabbing someone so hard with a long hard rod to the pound that it rips their skin and goes through their hand, this rod could be a jellyfishing net, knife, or your penis

When one yell's "Firmly grasp it" it means grab hold of yo cock before the crazy bitch cuts it off.

Also is the first rule of masturbation.

Something you have to do when you can't squirt all the cum out of yo man's penis.