Self-important and mundane or narrow-minded:a Pooterish, inhibited man...
She writes about their ‘relationship’ with a Pooterish self-regard that verges on the comic.’
In writing those awful Pooterish books about Iris, John Bayley has quite appropriated her life to his own ends - an irony of which director Richard Eyre seems utterly unaware.
It's a minor classic of Pooterish indignation.
Origin
1960s: from the name of Charles Pooter, the central character of Diary of a Nobody (1892) by George and Weedon Grossmith.