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choo choo

1 ENTRIES FOUND:
choo choo /ˈtʃuːˌtʃuː/ noun
plural choo choos
choo choo
/ˈtʃuːˌtʃuː/
noun
plural choo choos
Britannica Dictionary definition of CHOO CHOO
informal
1 
[count] : 1train 1 — used by young children or by adults speaking to young children
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— called also choo choo train
2 
[noncount] : the sound a train makes — used by young children or by adults speaking to young children