punchbag
nounUK /ˈpʌnt͡ʃbæɡ/ · US /ˈpʌnt͡ʃˌbæɡ/
Etymology From punch + bag.
› Synonym of punching bag.
1
UK A tough bag, usually cylindrical, filled with air, sand, or other material, and suspended so that swings freely, which is punched or kicked when practising sports such as boxing or martial arts.
2
UK, Figuratively A person serving as an object of abuse.