Jack Hammer

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.

Mike broke the table last night tying out the jack hammer on his new girl.

Jack Hammer by batman63 May 28, 2006

jack in the crack 

Submitting this because all the definitions are wrong. This term originated back in the 90's when Jack in the Box made national news from a bunch of stores getting people sick with E. Coli bacteria, which is basically from shit contamination. Hence, Jack in the Crack was born.

Hey, wanna go to Jack in the Crack?

jack in the crack by Jathra September 25, 2020

Jack

The most popular name in the UK for males.

Usually present in amazing lads who have great personalitys, great looks and a strong character. Jack the Lad....one who is up for a laugh always

you a Jack The Lad
Jack your a dude.

Jack by jrwoodie April 2, 2008

Jacksonville 

City in NorthEast Florida, hosted the 2005 Super Bowl. Pwns Orlando in every possible way. Best city in America.

Tourist 1: Wow that city is kool! It's better than Orlando!

Tourist 2: Must be Jacksonville!

Tourist 3: Jacksonville is full of people with the bling!

Jacksonville by Bob May 13, 2005

Jack

Jack is the kind of person you can always trust. There is always one person in your form called Jack. They are the class clown and are hilarious. Jack will always be your best friend no matter what. He is always there for you and is probably one of the nicest people you know. Jack may be your brothers best friend but he will always be yours. He will always be used as an excuse for having a crush.

"Do you have a crush on Jack?"

Jack by RabbitLem0n September 17, 2019

Jack

The coolest guy in the entire world. Blue eyes, brown hair. Tall and muscular, ticklish. And he rocks!

Jack Jack

Jack by all of mankind and the sun February 6, 2010

Defi-jack 

The act of someone stealing your definition on urban dictionary. It starts by you making up your own clever word that you think would be perfect for Urban Dictionary only to see that someone already defined it 3-to-5 years earlier. Results of being defijacked include, but are not limited to: complaing about it on Facebook and or Myspace, telling all your friends that the first definitions were actually you, and suicide.

After using the term "CTS"(Chuckle To Self) for about a week, Sam decided to put it on UD. You can imagine his disapointment when he saw that some punk had Defi-jacked it 3-to-5 years before hand. He immediatly started complaing about it on Facebook and he continued his rant until he decided to kill himself.

Defi-jack by sce1301 July 10, 2010