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1)A cocky person who thinks he is a senior but he's actually a junior
2)One who wears a North Face jacket without anything underneath and stares at juniors from afar
3)A junior who tries to graduate early
A: wait so like.....what are you?
B: i'm a sunior
A: ...
B: i'm like a junior but i'm graduating
A: ew.
by IAmNotASunior August 06, 2010
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