Noun
1. A physical or mental sensation so amazing it can be compared to Shaquille O’Neal's basketball skeelz.
2. Something pleasing enough to figuratively make the person ejaculate as much as Shaquille O’Neal can.
3. To ejaculate a huge load as if you were 7 ft 1 in, 325 lb and the greatest man to ever live.
1. "Jessica Biel...mmm, just thinking about her gives me a shaqgasm."
3. Two roads diverged in a wood, and I—
I took the one less traveled by,
And that has given me a serious raging shaqgasm.
Word used by Echelon and any other 30 seconds to mars fan to describe the feeling of (sexual) pleasure/happiness associated with watching a Shannon Leto/30 Second to Mars Music Video. In other words, a Shannon Leto induced Orgasm.
When a feeling of embarrassment or shame is experienced that is so powerful that it is analogous to an orgasm; shame is to a shamegasm as pleasure is to an orgasm.
When Hannelore, shy and suffering from OCD, was informed that she had been "flashing a lot of underpants action" while playing drums, she had a major shamegasm and was shocked silent for several minutes.
("Shamegasm" was first coined by Jeph Jacques, author of the webcomic Questionable Content)