1. in a manner that seems suspicious, questionable, or dishonest
Usage: informal
2. in a way that resembles or relates to fish
Usage: rare

Examples

• The deal seemed fishily constructed, with hidden clauses throughout the contract.
• He answered the detective's questions fishily, avoiding direct eye contact.
• The company's financial reports looked fishily inflated to the auditors.
• She smiled fishily when asked about her whereabouts that evening.
• The whole situation smelled fishily wrong from the start.