Jerkoffasaurus 

a jerkoff so over the top that he's a dinosaur

Matt is such a Jerkoffasaurus.

Jerkoffasaurus by Cletus John March 5, 2006

jerkoffasaur 

The term jerkoffasaur comes from combining "jerking off" and "dinosaur". Because dinosaurs are ancient, death and big different meanings apply to the term.

Meaning:
1. Being considered too old to masturbate.
2. Being unable to jerk off, like for example a T-Rex who couldn't masturbate because his arms are simply too short.

3. Dying from too much masturbation or being found with the deceased's hand touching the genital area.
4. Being a big jerk, the size reference can apply to both the size of the subject or the severeness of being a jerk.

1. "He's 40 and still living with his parents doing nothing more than jerking off..." "Don't act so surprised, didn't you know he's a jerkoffasaur?"
2. "He broke both his arms, the poor jerkoffasaur."
3. "He jerked off so many times that he died, what a jerkoffasaur!"
4. "My boss is such a jerkoffasaur that he had me working all weekend long!"

jerkoffasaur by The Mister With QR April 17, 2015

Jackoffasaurus 

uber douchebag, someone who is begging to be slapped in the nuts but you cant so you call them a Jackoffasaurus.

Also the better form of calling someone a jackoff.

Or someone who jacksoff to much.

Billy:Dude Your Shirt is gay.
Sean: stfu you Jackoffasaurus.
Billy:*Cries
Alex:Nice dude

Jackoffasaurus by Sean Wheeler January 14, 2008