Glass back

Some one who is lazy, won't bend over.

Worker 1 "He's a lazy fucker, he's not done a tap all day"

Worker 2 "He's scared his back will smash the glass back twat"

Glass back by Klausey September 15, 2009

Glass back

That guy who fear mongers in every comment section of someone squatting or deadlifting, saying that "you're gonna end up like Ronnie Coleman".

They think that spinal flexion == bad, because humans are obviously not biomechanically designed to pick up objects with any degree of spinal flexion.

They probably heard it from some stooge influencer or personal trainer; neither they nor he know what they're talking about.

Probably can't even pick up 225 lbs from the ground.

Wait until glass backs realize that you can actually build a strong and resilient back through squats, deads and proper load management

Glass back by Living Ass September 12, 2024

glass back fanny

this is a person who is acting like an idiot, maybe they are being a pain in the arse. this is never a compliment and should only be used as a last resort in an arguement

floz dont be such a glass back fanny and do as i say

glass back fanny by David Alderson July 27, 2005

grass back 

A dirty, smelly Canadian.

hey look at that tall homeless grass back bathing in the trashcan

grass back by john mclain March 5, 2008

Grass Back

A person who is cowardly.

Person A: hey did you hear that Tia became a youth pastor and told all her old lib friends they were on the devil's path?
Person B: Sounds like a Grass Back to me
Person A: Yeah, textbook case.

Grass Back by gloplord October 25, 2025

Glasspacks

Mufflers that are packed with fiberglass to muffle the sound. They come in different lengths. The shorter the glasspacks, the louder the car.

When I get my Corvette I am going to put glasspacks on it.

Glasspacks by OneBadAsp October 24, 2006

Glasspack 

A type of exhaust. Features a straight through exhaust tube to provide as much exhaust flow as possible (with holes or baffles in it to direct the exhaust into the packing) that is surrounded by a steel wool or fiberglass packing (sometimes both, varies by manufacturer) to make it relatively quiet considering its a straight through exhaust. Also look up fart can performance exhaust. Sometimes called cherrybombs because it was a major manufacturer of the exhaust.
"The fart can is the same thing as a glasspack"

"Both the glasspack and fart can exhaust work on the principle of absorption"

"The glasspack enables exhaust to flow better than most chambered exhausts"

Glasspack by TheFlacker99 December 17, 2012