fluky
['flu:kɪ]
adj.
侥幸的;
幸中的;
不可靠的;
变化无常的（尤指风）;
例句:
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This is fluky psychology, also be pure belong to accidental.
这是侥幸心理, 亦是纯属偶然.
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Getting that job was definitely fluky.
获得这份工作绝对是件侥幸的事情.
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That means a red-hot goalie or a fluky goal could easily eliminate a stronger team.
来自WSJ
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It was just this weird, fluky thing where the story really possessed me for a while.
来自THETIMES