1. games a children's game in which one player attempts to retrieve a ball thrown over him
or her by at least two other players
⇒ They were playing a game of piggy in the middle.
2. informal a person or group caught up in a disagreement between other people or groups
⇒ I was piggy in the middle, caught between the two, not wanting to hurt either parent
by favouring either colour., ⇒ Previously estate agents ended up as a piggy in the middle between landlord and tenant.
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