Petty quarreling. Usually considered a childish behaviour, although often applied to adults.(noun)
Present participle of bicker.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "bickering" in a sentence
"I have no interest in bickering over the strategic wisdom of Colbert's controversial congressional appearance, but I do have a bone to pick with his message."
"The only way to end their bickering is to invite all four of them into my bed."
"I hope that the final version of this bill will really mean something by the time the bickering is through."