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1.
A combination of a Pegasus and Unicorn, strong enough to beat sasquatch.
Sasquatch is way stronger than both a unicorn or a pegasus, but a pegacorn could totally take him.
by 42van braam December 11, 2006
 
2.
Its an unicorn with wings, they fart rainbows and shit diamonds and are totally awesome, Chuck Norris has eight.
-Holy shit its a pegasus!
- No man, dont you see the unicorn? its a pegacorn.
by Bubamacko December 29, 2009
 
3.
The hybridization of a pegasus and a unicorn. apparently its more stable.
a magical unicorn with wings is a pegacorn
by unicorness May 17, 2014