The act of looking forsomething, without actually looking, then deeming said item lost or not able to be found, when, in fact, said item was in the vicinity of area that was glanced over upon initial inspection.
Dude: "I can't find my keys anywhere! I know they were just on this desk!"
Chick: "Did you actually look for your keys? Or did you dude look?"
Dude I love your car is the meaning of a hand symbol in which the back of the hand is displayed to the driver of a car, and the pinkie and index finger are held up. The hand symbol may or may not be accompanied by an exclamation of 'Duuude! I love your car!"
Awesome car guy: -Drives past in an awesome car-
Girl one: -flashes the 'dude I love your car' sign-
Girl two: What'd you just do that for?
Girl one: It means Dude I Love Your Car. Duh.
Girl two: I guess his car was pretty awesome.