When US President Joe Biden addressed Congress and gave his ‘State of the Union’ address he was (at times) greeted by ‘catcalls’. Writing in the Wall Street Journal Daniel Henninger said, ‘The speech’s most publicised moment was the Republican catcalls.’ We know immediately what is meant. The Merriam-Webster Unabridged gives that meaning as, ‘a loud or raucous cry expressing disapproval’.