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One who is willing to taste, explore, tempt, examine.

From Middle English costnien, from Old English costnian, subsidiary form of Old English costian ("to tempt, try, prove, examine"), from Proto-Germanic kustōnan (“to try, taste”), from Proto-Indo-European *geus- (“to enjoy, taste”). Cognate with German kosten ("to taste").
"Give it to that Costen, he'll try anything"

"I bet he'll do it he's a Costen"
by limbicone March 09, 2013
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