To jab someone in the throat with an upward palm, fingers together similar to the way Steven Seagal hits people. This is accented by saying "Seagal" as you do it.
I was walking through the bar "Seagaling" random strangers.
I snuck up on Dino and jabbed him in the throat, yelling "Seagal" as I did it.
That fucker Seagal'd me for no reason when I was leaving the Sox game.