Adjective. Used to explain a person who says/does something so junky, retarded, stupid, or stinky, that the action is un-explainable.
Examples:

A silence followed Abby's sentence. She had just told a very lame joke. "Wow...that was so swoy." her friend said.

The girl wrinkled her nose in disgust at the guy sitting in front of her. "I know that guy from school," she said. "He does the most swoy things."
by xzeroforeverx April 29, 2013
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The sound a rofl copter makes when taking off

can be used in times of pure ownage
hahaha i owned you, swoi swoi swoi
by Jamgla May 11, 2008
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