look up any word, like dirty sanchez:
 
1.
n. semi-solid bodily waste manifested or produced by the vegan dieter.
"Oh fuck...your Cali friend left a soy bomb in the shitter again. Rude vegan bastard."
by CaptainZlogg July 23, 2009
 
2.
When Bob Dylan played 'Love Sick' at the 1998 Grammy awards, a shirtless man with the words "Soy Bomb" painted on his chest got up on stage and began gyrating around in a bizarre dance, while an unfazed Dylan continued his song. The man, later known as Michael Portnoy, was escorted away by security after about a minute, and it was later revealed that he did it as "an act of revolution", even though several years later people still don't know what the hell it means.
What the hell is a Soy Bomb?
by yarrg April 30, 2005
 
3.
In addition to the above (below?);
When interviewed, Portnoy explained his term so:
"Soy...represents dense nutritional life. Bomb is, obviously, an explosive destructive force. So, soy bomb is what I think art should be: dense, explosive art."
Whatever Happened to Soy Bomb?
-Eels
by Hadley J September 25, 2005
 
4.
To interject one's self into a performance uninvited for the purpose of bringing attention to yourself or some cause.
The damned dirty hippie pulled a soy bomb during Bob Dylan's performance with no purpose other than to attract attention to himself.
by DB_Echo April 28, 2012