To show up late for school or not show up at all. It's also an Icelandic name.
He is pulling an Arnar today. He pulled an Arnar yesterday.
by Heimir January 24, 2006
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A beautifull crazy man, who will do just about anything for a good laugh, an absolute madlad
Oh look! A madlad making people laugh. Must be an Arnar
by An absolute madman November 22, 2021
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A faggot who eats his own cum
that faggot over there eats his own cum. yeah he is such an Arnar
by pu$$ymagn3t May 17, 2022
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Meaning 'isn't it' or 'it is'

often used when agreeing with someone else
by Steven Gerrard December 10, 2003
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