the attribute of your ribcage protruding from your back and being extended to the point you can use them to stand rather than using your normal legs.

those who have ribcage spider legs may have also developed a blood hydraulic system and some makeshift joints within the ribcage spider legs allowing them to actually walk using their strange bone protrusions.
person 1: "Hey did you hear that jimmy developed ribcage spider legs?"

person 2: "Dude wtf! how did you get in my house?"

person 1: "jimmy gave me a ride." *points out broken window*

jimmy: *bone crunching noises as jimmy approaches the window* "my darkened soul hungers for your flesh."

person 2: *screaming*

person 1: "hahaha classic jimmy"
by gechlorsh the unfathomable October 28, 2021
Get the ribcage spider legs mug.