To cheer in opposition to or in response to someone else's cheering; to express encouragement for the opposing side.
From counter- (against) + cheer. Cheer comes from Old French chere, meaning 'face' or 'expression,' which evolved to mean 'encouraging words' and eventually 'enthusiastic shouts of support.'
Countercheer dynamics at sporting events create interesting psychological effects—research shows that rival fans cheering against each other intensifies emotional investment and team loyalty.
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