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To flick one's tongue around the rim of a Starbuck's lid while driving, in order to find the sipping hole when it is either too dark to see it, or one's attention is otherwise occupied.
"Man, it was so dark in my car, I was doing Javallingus for like an hour before i could get a sip!"

"I was checking out that chick's ass and trying to sip my coffee at the same time... She turned around and totally caught me in the middle of Javallingus!"
by Papasanfolkhero February 15, 2010
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