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verb (used with an object)
1. to reduce (an object) to useless fragments; injure beyond repair or renewal; demolish; ruin; annihilate.
2. to kill; slay.
3. to render ineffective or useless; nullify; neutralize.
4. to defeat completely.
"Hide Aunt Millie's antique vase, Tia is coming over and has been known to Megashark all in her path."

"Tia stepped on my guitar and totally Megasharked it."
by ZaZ Monster October 04, 2011
The most badass predator of all time, nemesis to the giant octopus.
Oh, Shit! Megashark!!!
by the one true urdler November 24, 2009