/ˈtɪpə(r); NAmE / noun
1.
(used with an adjective) a person who gives sb a tip (= a small amount of extra money to thank them for doing sth as part of their job) of the size mentioned :
She says that Americans are usually big tippers.
2.
(also ˈtipper lorry / truck ) a lorry / truck with a container part that can be moved into a sloping position so that its load can slide off at the back