When a situation is so derp-tastic (awkward and such) to the point where the moment is so past the extent of derp it is a derp explosion.
Peggy- *jumps off rock*

Sue- you are going to die
Peggy- *survives the fall*
DERP EXPLOSION.

or

A kitty named Maru starts liking male groin, his mother walks in….DERP EXPLOSION.
by PeggyandSue July 29, 2011

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