Tin Ribs 

A derogatory term for someone who's so thin that his/her ribs are visible.

Morty: Oi tin ribs!
Ivor: *cries in corner*

Tin Ribs by Pink Viliors October 27, 2008

tinribs 

A gesture actioned towards someone disgustingly underwieght, so much so their ribs resemble a ribbed tin can, commonly found containing cheap baked beans.

Oi tinribs, get your ass over here!

tinribs by DanCass December 29, 2007