A person who collects various discarded and unwanted precious metals (aluminum, steel, etc.) and takes said metals to a scrapyard where they are rewarded with a small monetary reward. Such rewards are determined by the type of metal and collective weight. Most often a scrapper does not have a steady/regular paycheck to count on so the scrapping they do is treated like a regular 9 to 5 occupation.

Someone who looks small but is really wired and can kick some major ass even though he doesn't look like it.

someone who is very good at fighting and coming out of a fight winning

(1) Someone who collects and sells scrap and/or trash, others have discarded.

(2) Someone who is habitually involved in physical altercations with other people.

One who collects scrap metal and cashes it in for cash!

19th Century term referring to poor people fighting over the scraps left inside a trash can.

someone who does something that is annoying and petulant or someone who just plain fucks with people