Green’s Dictionary of Slang

to behave in a loutish manner.

1898		(con. 1875) F.T. Bullen Cruise of the ‘Cachalot’ 163: Most of the transformed crowd ya-hooing on the beach had felt the weight of his shoulder-of-mutton fist.
1979		D. Maitland Breaking Out 126: The whole bloody male population of the town was getting pissed and yahooing and gambling and fist-fighting.
1985		J. Sherwood Botanist at Bay 23: Thornhill replied by calling them yobbos and warning them that they would be chucked out of the meeting unless they stopped yahooing about.
1996		(con. 1964-65) B. Thorpe Sex and Thugs and Rock ’n’ Roll 178: [They] kept on drinking and yahooing.