dirt bike
US /ˈdɜːrt baɪk/
UK /ˈdɜːrt baɪk/

1.
motocykl terenowy, cross
a lightweight motorcycle designed for use on rough terrain, often in races or for recreation
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He loves riding his dirt bike through the trails.
Uwielbia jeździć swoim motocyklem terenowym po szlakach.
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They bought a new dirt bike for their son's birthday.
Kupili nowy motocykl terenowy na urodziny syna.