This situation in which an individual finds themselves armless and also in desperate need of a lift somewhere. Rather than sticking out their thumb in hopes of getting a car to stop for them, they are left with no choice, due to lack of arms, to expose their rock hard dong out from their fly to simulate the same effect.
Man1: Oh shit I just remembered I'm gonna have to hitch hike to the Vietnam memorial service, but I lost my arms in the war!
Man2: No excuses! You still gotta dick ain't ya? Looks like it's the armless Hitch hiker for you...
Someone who has withdrawn from all real-life social interaction. A hikikomori rarely leaves their home, and has no friends or family with whom they interact. A hikikomori is NOT always an otaku, nerd, gamer, etc, though they can be.