1. Military extension of helmet meaning someone who rides the short bus and thus needs a helmet for safety. Used when the person being so named might catch on to the civilian slang use.

2. Also used in the context of Kevlar being dense but light-weight implying the subject is dense and a intellectual light-weight.
"Hey, Kevlar, I need you to go get me a box of chem-light batteries!"
by zArkham4269 September 9, 2009
Material that is actually nylon streched very thin, which makes it much tougher. Used in everything from bullet-proof vests to gun stocks.
I only where about ten layers of kevlar. I hope that can stop a shotgun blast.
by Galloping Ghost June 6, 2005
1. A material used in bullet-proof vest.
2. A crappy first boss in TRUE CRIME: NEW WORK CITY (spelled 'Kev-Lar').
1. "If it wasn't for this Kevlar, I'd be dead by now!"
2. "Jesus Christ, Kev-Lar's a stupid fucking character. I'm glad Marcus blew his fucking brains out with an Uzi."
my dogs name! o also a materal they put is hydroplane boats and you where kevlar while raceing a hydroplane boad it helps u float if u fall out!
1. come here kevlar!
2.the kevlar helped me float whene i fell out of a boat it saved my life!
by jessica May 31, 2004
Protective clothing worn around scorned or man hating women.
Shes pissed dude, better break out the kevlar boxers if you go home tonight.
by Lester Burnham July 16, 2005
A metaphorical badge of loyalty usually referenced as an item of travel gear when visiting a good friend in a tight spot.
“I’m visiting my buddy in the Army next week but he’s stationed at a pretty wild post, you know, murders, kidnappings, war brides, that kind of thing; so, I’ll definitely be packing my Kevlar neck gaiter.”
“Jesus, where’s he stationed, Fallujah?”
“Nah, Fort Bragg.”
by Tin Hat Kippah December 9, 2020