little, small, tiny
She scribbled the address on a little scrap of paper.

last
He removed the last scraps of food from his plate.

leftover
food, kitchen, table (AmE)
The pigs are fed on food scraps.

scrap of
Every scrap of land in the town has been built on.

every last scrap
He ate every last scrap of the food.

piece

sell sth as, sell sth for
The engine has been sold for scrap.

iron, material, metal, paper, wood
heap, yard (usually scrapyard)
My first computer has been consigned to the scrap heap.

dealer, merchant (BrE)
value
The scrap value of the car is around $200.

get into, have

in a/the scrap
He looks like he's been in a scrap.

scrap with
He had a bit of a scrap with the boy next door.