Definition of bickers:
(v) :
To quarrel in a tiresome, insulting manner.
(n) :
A wrangle; also, a noise, as in angry contention.
(v) :
To brawl or move tremulously, quiver, shimmer (of a water stream, light, flame, etc.)
(v) :
To skirmish; to exchange blows; to fight.
(n) :
(countable) A skirmish; an encounter.
(v) :
(of rain) To patter.