bellyaching

This term carries a strong negative connotation, suggesting that the complaining is not only persistent but also unjustified or childish. It implies a lack of productivity and a tendency to whine rather than seek a solution, making it highly informal and often critical in tone.

Because it is derived from the gerund form of the verb, the noun usage refers to the general activity of complaining. While it can be used as a countable noun in specific instances of a "bellyaching session," it is most frequently treated as an uncountable activity describing a behavioral trait.