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1. slang Strange or suspicious. Why is everyone ignoring me today? Is something hinky going on?
2. slang Aloof or conceited. Jen is usually warm and friendly—I don't know why she was acting so hinky today.
3. slang Nervous or uneasy. Sam's acting so hinky because he thinks you don't like him.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.