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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!"
by Brock, "Dirty Sanchez," Otten October 04, 2007
A geek's condom; Helps prevent viruses
Remember to practice safe hex and use a firewall!
by Daniel March 24, 2005
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
by Urban-k September 02, 2003
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.
by Deceptik0n July 12, 2005
1. STD-infected female genitals.
Don't screw her...that bitch got a firewall.
by CNJACL September 10, 2010
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
by musclecarboy247 September 12, 2011
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.
by Light Joker August 26, 2007