Glowerworm 

(aloof, craven, glower, & worm), someone who takes pride in or feels justified by scowling at someone else anonymously; expressing hostility towards someone, without verbally addressing that individual directly, privately or publicly; someone who conveys anger with another individual, without saying anything.

That guy scowling in the restaurant may be esteemed in his own community, but I now realize that he is either another glowerworm or just a figment of my twisted imagination.

Glowerworm by Darth Johnny December 2, 2010

GlowWorm 

When a person places one or more glow sticks in their arse, often for sexual pleasure or drunken amusement, in the dark. Often used as part of dogging / voyeurism / public sex to help guide would be suitors / voyeurs.

Also known as a firefly or beacon.

example 1 : "Jill went dogging last night, and did a glowworm, after 10 minutes she apparently had a queue of suitors and countless people watching in the shadows! She said it really got her off!"

example 2 : "man we were so pissed last night, we found a bunch of glow sticks and did a naked glowworm race down the street - the loser had to buy the next round"

GlowWorm by ColonelTessieIceBeaconThe2nd January 10, 2013

GlowWorm 

A loser who fails at life.

Person 1: Wow, that guy is such a GlowWorm!
Person 2: Yeah, he sucks at everything.

GlowWorm by NotAGlowWorm November 30, 2007

Glowwormheadass 

When a men give you worms. He becomes a glowwormheadass.

A man can give you glow worms with his glowwormheadass.

Glowwormheadass by Readmeagain June 1, 2022