A scrap of something is a very small piece or amount of it.

Scraps are pieces of unwanted food which are thrown away or given to animals.

If you scrap something, you get rid of it or cancel it.

Scrap metal or paper is no longer wanted for its original purpose, but may have some other use.

Scrap is metal from old or damaged machinery or cars.

You can refer to a fight or a quarrel as a scrap, especially if it is not very serious.