Self-shot of a man's penis taken at close proximity causing a glowing effect from the blinding light of the camera flash. The penis in the picture then resembles the popular 1980's stuffed toy "Glow Worm".
Dumbass you should have shut the flash of so you didn't get a glow worm!
When a person squints his/her eyes in the same fashion of the 80's stuffed toy with a hard plastic head that looks like a worm stoned out of his mind. While doing this one must draw in very close to your partners face and stay their till they acknowledge that you are doing the "Glow Worm".
I want to Glow Worm you till you can't take it any more!