1. resembling or characteristic of a rat
Usage: rare
2. having a sharp, cunning, or untrustworthy appearance or manner
Usage: informal

Examples

• His rattish features made her uncomfortable.
• The old man had a rattish grin that suggested mischief.
• She noticed his rattish behavior during the meeting.
• The character’s rattish appearance fit the villain perfectly.
• His rattish mannerisms reminded everyone of a scheming politician.