We found one dictionary that defines the word smuggish:

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1. smuggish: Wiktionary

Definitions from Wiktionary (smuggish) ▸ adjective:  Somewhat smug. ▸ Words similar to smuggish ▸ Usage examples for smuggish ▸ Idioms related to smuggish ▸ Wikipedia articles (New!) ▸ Popular nouns described by smuggish ▸ Words that often appear near smuggish ▸ Rhymes of smuggish ▸ Invented words related to smuggish