punching bag
noun
/ˈpʌnt͡ʃɪŋ ˌbæɡ/
,
[ˈpən(t)ʃɪŋ-]
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- A tough bag, usually cylindrical, filled with air, sand, or other material, often suspended so that it swings freely, which is punched or kicked when practising sports such as boxing or martial arts.
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Sandsack,
Boxsack
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