What is the meaning of Nicker?

Pound sterling.

A soft neighing sound characteristic of a horse.

A snigger or suppressed laugh.

To make a soft neighing sound characteristic of a horse.

To produce a snigger or suppressed laugh.

One of the night brawlers of London formerly noted for breaking windows with halfpence.

The cutting lip which projects downward at the edge of a boring bit and cuts a circular groove in the wood to limit the size of the hole that is bored.

Someone who nicks (steals) something, a thief.

To snatch or steal.

A type of mythological sea creature or sea monster; also, a water sprite; a nix or nixie; a mermaid or merman.

nigger.

Source: wiktionary.org