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leapfrog /ˈliːpˌfrɑːg/  

  • noun
    [noncount] :a children's game in which one player bends down so that another player can leap over the back of the first player
    play leapfrog
    verb
    -frogs; -frogged; -frogging
    to move ahead of or beyond (someone or something) in a very quick and sudden way [+ obj]
    usually + over