firewall 

A program that defends your computer from malicious users accessing and using your computer either as a port to someone elses computer or to totally mess up yours :)

My firewall kicked that hackers ass last night

firewall by Urban-k September 2, 2003

Firewall 

A geek's condom; Helps prevent viruses

Remember to practice safe hex and use a firewall!

Firewall by Daniel May 13, 2005

Firewall 

Any of a number of security schemes that prevent unauthorized users from gaining access to a computer network or that monitor transfers of information to and from the network.

My Firewall pwns your face.

Firewall by Deceptik0n July 29, 2005

Firewall 

When a man with red hair spreads his excess scrotum skin over the face of a woman.

"Chris, I want you to strap me down and firewall me"

"AHHH, You're suffocating me with your firewall!"

Firewall by Brock, "Dirty Sanchez," Otten October 20, 2007

FIREWALL 

1. STD-infected female genitals.

Don't screw her...that bitch got a firewall.

FIREWALL by CNJACL September 10, 2010

firewall 

1. a progam that protects a computer from malware and other forms of outside intrusion

2. any protective barrier between two places

My firewall needs to be updated.

firewall by Light Joker September 5, 2007

Firewall 

A burning sensation at the end of your penis that prevents pissing

Dude I had to go piss last night but I had a firewall

Firewall by musclecarboy247 September 12, 2011