Season 3 · Episode 29
Bluey
Indy thinks she's no good because her model horse looks like a cow, but Calypso encourages her not to give up.

A fixed idiomatic phrase used to say someone is behaving in their characteristically mischievous or unpredictable way. The meaning is non-compositional: the literal words give no clue that it refers to habitual trouble-making.
Used as a spoken interjection to mark a moment of comic defeat, awkwardness, or embarrassment. It signals that things have gone flat or sideways, similar to a deflated-balloon feeling. Common in casual speech among children and adults in Latin America.