Cool, neat, nifty, suave.
Origin: In about 2000 (give or take a year), a student taking Old English at a Wisconsin university saw the word 'swa' used to mean 'so; thus' in an Old English text. It reminded this student of the word 'suave' (which in common use is roughly similar in meaning to 'cool'), and the student started using 'swa' to mean 'cool' around friends and associates (and continued doing so after moving to the West Coast).
It caught on.
Katamari Damacy is swa!
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