bicker

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To engage in a bad-tempered quarrel, often in a petty manner over something trivial; squabble. synonym: argue.
• intransitive verb To flicker or glitter.
• intransitive verb To move or flow with a rippling or gurgling sound.
• noun An angry quarrel; a squabble.

from The Century Dictionary.

• To exchange blows; skirmish; fight off and on: said particularly of the skirmishing of archers and slingers.
• To quarrel; contend in words; engage in petulant altercation; wrangle.
• Hence —3. To make a brawling sound; make any repeated noisy action; clatter.
• To run rapidly; move quickly; quiver; be tremulous, like flame or water.
• To make a short rapid run.
• To strike repeatedly.
• noun A fight, especially a confused fight.
• noun A quarrel; an angry dispute; an altercation.
• noun A confused or rapid succession of sounds; a rattling or clattering noise.
• noun A short rapid run or race; a staggering run, as from loss of equilibrium.
• noun A bowl or dish for containing liquor, properly one made of wood; a drinking-cup; also, specifically, in many parts of Scotland, a wooden dish made of staves and hoops, like a tub, for holding food.

from the GNU version of the Collaborative International Dictionary of English.

• noun Prov. Eng. A small wooden vessel made of staves and hoops, like a tub.
• noun obsolete A skirmish; an encounter.
• noun Scot. A fight with stones between two parties of boys.
• noun A wrangle; also, a noise,, as in angry contention.
• intransitive verb obsolete To skirmish; to exchange blows; to fight.
• intransitive verb To contend in petulant altercation; to wrangle.
• intransitive verb To move quickly and unsteadily, or with a pattering noise; to quiver; to be tremulous, like flame.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To quarrel in a tiresome, insulting manner.
• verb To move tremulously, quiver, shimmer (of a water stream, of a flame)
• noun A skirmish; an encounter.
• noun Scotland, obsolete A fight with stones between two parties of boys.
• noun A wrangle; also, a noise, as in angry contention.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb argue over petty things
• noun a quarrel about petty points