The act of any girl with the letters "kat" in her first name (in that order) attacking you with her class, wit, devilish good looks, and amazing charm. Only people of extreme importance get the privilege of being katattacked.
Names include: Kate, Katherine, Kathryn, Kathy, Katie, Katrina, and especially Kat.
Dude... last night at the party Kate Bentley totally katattacked me... I think I'm in love.