having a girl lay on her back on the floor with ass in the air while you are horizontal above her with hands on the coutch and feet on end table jack hammering the piss out of her.
The only known technique to rid yourself of Class-A clinger. When you know she won't ever let you leave her and will cry on your shoulder weeks after you've moved on, give her a quick fast pounding with your dick and then head for home. She will breakup with you in a seconds and you will have won back your freedom!
Friend: How did you ever escape from Caroline?
You: I gave her a good jack hammer and now my life is back to normal.
A sex act that involves clapping your hands together and making a pointer with your index and middle finger. You then slide the "jack Hammer" into your girlfriend and you shake your arms like a jackhammer.