Tail Cheering is when someone doesn't know whether to boo or cheer for a team while watching sport with friends/family therefore follows what everyone else does. (despite having no idea what the hell is going on)

This is usually done when someone is desperate to fit in or wants to make a good impression in front of friends and family.
Guy: Woooo!

Friends: Why the hell are you cheering? We just lost!
Guy: Oh damn... uhhh.. yeah I know... I was being a good sport is all... hehe..
Friends: You were Tail Cheering this whole time weren't you?
by GraddadGiveMeAGumJob May 17, 2018
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