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When you absolutely bomb something, mimicking the struggles of a junior in high school. Also known as failing miserably.
Turd: Hey how'd that chemistry test go today guys?

Cool Guy: Oh I aced that thing. Basically went Jesus mode.

Turd: How about you?

Junior: Good god I junior swagged out hard today.

Turd: Soooo, F, right?

Junior: Yeah. 23%. Junior swag!
by ToilaHoney February 07, 2012
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