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\ ˌəp-ən(d)-ˈdau̇n 
, ˌəp-ᵊm- \
, ˌəp-ᵊm- \Definition of up-and-down
(Entry 1 of 2)
1 : marked by alternate upward and downward movement, action, or surface
2 : perpendicular
up and down
adverbDefinition of up and down (Entry 2 of 2)
1 : to and fro paced up and down
2 : so as to move upward and then downward repeatedly
jumping up and down
3 archaic : here and there especially throughout an area
4 : with regard to every particular : thoroughly knew the territory up and down
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Time Traveler for up-and-down
The first known use of up-and-down was in the 12th century
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