A trump of red herrings
A deafness of herrings.
A zip of cheetahs.
A turn of screws.
A taming of shrews.
From Westworld:
A rampage of hosts.
A helplessness of guests.
A fodder of QA men.
My favorite – though not original – is a wunch of bankers.
A flickering of fireflies.
An asscrack of plumbers
A startle of surprises
An homage of parodies
A burden of cares
A cacophony of herring.
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A garbanzo of beans.
A Grope of pervs.
A banana peel of slipperiness.
A bling of rappers.
Edit: n/m - bad taste.
A gossip of grandmas.
A hustle of coaches.
A corral of westerns.
A slash of horror flicks.
A starfleet of scifi movies.
A riot of comedies.
A plural of penises