Top definition
"Attempting to force an angry frown through a shit-eating grin, and failing miserably."

From verb "frin": frown attempt overruled by amusement

Origin: I received "frinning" as a typo and knew it was just too good a word to waste. The writer was a dear friend who made a lot of typos, which sometimes became exasperating but were often funny, and I realized I was, at that very moment, frinning myself.
"OMG Jane, you sent that cartoon to your MOTHER?!!" Steve partly SHOUTED, frinning devilishly.
by Alphtoo May 28, 2009
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