Merriam-Webster's Collegiate® Dictionary, 11th Edition
BICKER
I. noun
Etymology: Middle English biker
Date: 14th century
petulant quarreling ; altercation , a sound of or as if of bickering,
II. intransitive verb (bickered; bickering)
Date: 15th century
to engage in a petulant or petty quarrel ,
2. to move with a rapidly repeated noise , quiver , flicker , bickerer noun