Blow-off valve 

In a car that is equipped with some sort of forced induction system ,such as a turbo or a supercharger, a blow-off valve is usually availible as an aftermarket part to release excess pressure (boost) from the turbine system. Makes a very distinct noise. Like - pssssshhhhhhhhh! Or somtimes a chirping noise depending on the blow-off valve. Usually replaces a stock part usually refered to as a by-pass valve.

1. Gil: Whoah, dude! Did you hear that car go by?
Willy: Yeah, it sounded like it had a blow-off valve.

Blow-off valve by Wilburt May 9, 2006

Blow off some steam 

To take part in a perceived fun activity or activities after an intense emotional taxing day or days at work , school, or home. Always associated with doing something different to get your mind away from your problems. Typical non-harmful activities include exercising, sex, playing games, camping, dancing, watching a movie, listening to music.

Some activities can be satisfying but ultimately detrimental to your health such as binging on alcohol, drugs, smoking, or food.

Other activities can be criminal. Spray Painting walls, vandalizing homes or places of businesses, rioting (usually after a favorite team loses), or physically taking their aggressions out on people (spousal abuse, worker abuse or detainee abuse have been cited as blowing off some steam).

Example 1:

Buddy 1: "Damn, your boss is making you work weekends and overtime over something he did wrong? WTF?

Buddy 2: "I know man, well lets go to the bar, grab some brews and blow off some steam"

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Example 2 (CBS News):

Rush Limbaugh trying to explain why detainees were tortured by U.S. personnel in Abu Ghraib, Iraq:

"This is no different than what happens at the Skull and Bones initiation, and we're going to ruin people's lives over it, and we're going to hamper our military effort, and then we are going to really hammer them because they had a good time. You know, these people are being fired at every day. I'm talking about people having a good time, these people, you ever heard of emotional release? You ever heard of need to blow some steam off?"

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Example 3:

Her: "I don't feel like having sex tonight, my hair is a mess and I have a headache....(10 seconds later) ..Where are you going?"

Him: "Gonna blow off some steam (Drives off)"

Blow off some steam by The Fuzzy Popsicle July 8, 2009

Blow off some numbers

Brainstorm the numeric value of quantification as a method of relaxation and ascending to a higher state of emotional stability in the workplace.

In Jack in the Box, we used to blow off some numbers at least once per week. Here we are, all VPs now.

Blow off some numbers by ef_ July 27, 2016

Blow Off-philia

you get hot when people wait for you

after 3 days of her waiting for him, he got blue-balls from the Blow Off-philia from the long erotic wait

Blow Off-philia by Fijjuggsgjijhhyggggg-about it May 28, 2019

Blow off fuse 

To blow off fuse

Woah! Did you see that?! Three DDRFUK members just blew off fuse! He was literally exploding XD

Blow off fuse by Tom February 29, 2004

Blow off the easy one

Another term for masturbating.
To blow off refers to the act of masturbation, and the easy one refers to the penis

Me: "What are you doing tonight?"
Friend: "I'm gonna blow off the easy one"

Blow off the easy one by Stevens Slowjerk November 4, 2008

Justifiable Blow Off 

The act you perform when you blow off your homies for a hot ass chick when deep down your homies are being jealous of you cause you're kickin it with the girl they want which in conclusion. Its a justifiable blow off

Andy: so they are definitely mad I pulled a justifiable blow off, but I really don't give a fuck
Kevin: hey, its all good, gotta blow off the homies every now and then for a chick
Andy:oh, it was definitely worth it!!!

Justifiable Blow Off by Ya Boy Trax August 9, 2010