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When you fart so hard and so loud, it seems as if your ass might have exploded. You check to see if you ass is still there, but to your suprise, your ass still exists, and with it, you have left feces in your pants.
"Did you hear that?"

"Did I hear that? I felt it! That guy must have had an anal explosion!"
by Kyle Berliner October 24, 2008
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holy shit was that a fart? i felt the vibes through the floor

fuck no it must have been an anal explosion from that fat dude in the pool
by STEVO November 28, 2004
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