Noun high roller has 2 senses
  1. big spender, high roller - one who spends lavishly and ostentatiously on entertainment; "the last of the big spenders"
    --1 is a kind of spendthrift, spend-all, spender, scattergood
  2. high roller - a gambler who wagers large sums
    --2 is a kind of
    gambler
,
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