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

GlassBackMat 

12 years experience in slacking. Good at standing, clock-watching, not missing breaktime and making memes with photoshop. Doesn't work weekends.

What's the time GlassBackMat?
Are you working Saturday, GlassBackMat?

GlassBackMat by VirgilNeedham October 15, 2020

glassback 

General Dosser
Slacker
Boot Dragger
Glorified Labourer
Doesn't Work Weekends

Good job you're not on price, you glassback bastard.

glassback by VirgilNeedham October 15, 2020