1 definition by The Stealer of Ah-noose

Top Definition
When someone fills another's bum with sun tan lotion and then proceeds to have anal sex with them and moves such an alarming rate that it causes the receiver's rectum to become tan from the glowing heat of the giver's penis.
"Damn it!" - Male 1
"What?" - Male 2
"I need some sun tan lotion so I can give my wife a sun worm!" - male 1
"holy crap that is gross." male -
by The Stealer of Ah-noose March 19, 2012

Mug icon
Buy a Sun Worm mug!