Friendly hand gesture/greeting in which you point both of your index fingers at someone with your thumbs up and flash a "Heyyy!" smile, mimicking Isaac the Bartender's greeting to the camera in the opening titles of every episode of "The Love Boat."
One of my roommate's friends waved at me during the party. I couldn't remember his name so I just flashed him a double Isaac and kept moving.
by Rotter June 05, 2007
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