UP AND DOWN
\ˌʌp and dˈa͡ʊn], \ˌʌp and dˈaʊn], \ˌʌ_p a_n_d d_ˈaʊ_n]\
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moving backward and forward along a given course; "he walked up and down the locker room"; "all up and down the Eastern seaboard"
By Princeton University
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heat-seeking missile
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