The phrase 'absurd behaviour' is correct and usable in written English.
It can be used in formal or informal contexts to describe behaviour that is irrational, foolish, or ridiculous. For example, "She was reprimanded for her absurd behaviour when she threw a tantrum in the middle of the meeting".
The tax results in absurd behaviour.
The hilarity of such absurd behaviour masks a darker question: what are the health risks for a man so tied to the booze in his twilight years?
Nick Clegg has mocked Michael Gove over his "absurd" behaviour as education secretary as he condemned Tory plans for England's schools.
Chris Grayling, the justice secretary, has been accused by Simon Hughes, his Liberal Democrat ministerial colleague, of "absurd" behaviour over plans to block staff in the Ministry of Justice from paying trade union subscriptions through their pay packets.
Would you say a bad economy contributes to absurd behaviour?
Knox, however, only helped the prosecution along, engaging in absurd, even callous behaviour after the murder.
Charlotte Baines, for Harness, said her client apologied for his "foolish, absurd and reckless behaviour" and said he was "ashamed and disgusted" by what he had done.
Even the Tooks (with a few exceptions) thought Bilbo's behaviour was absurd.
My opponents had made my behaviour seem absurd, but in these letters real people were telling me that my experience was not isolated, it was common.
Obviously, people should be responsible for their actions, but it's absurd to judge the behaviour of a thoughtless individual by the same standards as we apply to that of a professional news organisation such as the BBC.
And because celebs and teens are practically renown for their absurd, viral-content-generating behaviour, Coachella has become quite the petri dish for stupid and nonsensical shenanigans.
