smacker

/S M AE1 K ER0/
noun
  1. 1

    One who smacks or spanks.

  2. 2

    One who makes a smacking noise, especially while eating.

  3. 3

    A kiss.

  4. 4

    The lips.

  5. 5

    A dollar.

  6. 6

    (usually in the plural) A pound (money).

Source: https://en.wiktionary.org/wiki/smacker