It comes from the following sentence which is spoken by a boy who normally
uses Tokyo dialect.

> おれもだあ! おれもヘッドギャなんて **ちゃらくさい** もんはいらんっ グローブも体重に関係なくいちばんでっかい十二オンスだ
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2019-12-10T17:18:11.977
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2019-12-10T19:17:25.863
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words manga compounds
What does the word 「ちゃらくさい」mean?
Most likely it is ちゃらい＋くさい, meaning 'really gaudy/cheap' or 'reeking of
gaudiness'.

When used as a suffix, ～くさい usually adds a negative connotation to whatever
precedes it. This can be used in the literal sense when there is an actual
perceptible odour (酒臭い, 汗くさい), or in the figurative sense to mean 'evoking a
sense of ...' (嘘くさい, 邪魔くさい).

In your example, it would be a figurative use of チャラい. However, it appears to
be a somewhat irregular usage. As a suffix, ～くさい usually attaches directly to
nouns or na-adjectives rather than i-adjectives. So dropping the い of チャラい
could be considered a kind of slang usage, perhaps.

It would be interesting to find other examples of i-adjective stem + くさい. I
have a vague memory of hearing えらくさい（偉い+くさい) somewhere but I can't be sure.
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2019-12-10T18:45:24.580
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answer