What is the meaning of Bicker?

To quarrel in a tiresome, insulting manner.

To brawl or move tremulously, quiver, shimmer (of a water stream, light, flame, etc.)

(of rain) To patter.

To skirmish; to exchange blows; to fight.

A skirmish; an encounter.

A fight with stones between two parties of boys.

A wrangle; also, a noise, as in angry contention.

The process by which selective eating clubs at Princeton University choose new members.

A wooden drinking-cup or other dish.

Source: wiktionary.org