1. present participle of cosy; making oneself comfortable and warm
Usage: British spelling
2. attempting to gain favor or influence through friendly behavior
Usage: often used with ‘up to’

Examples

• She was cosying up by the fireplace with a good book.
• The cat was cosying into the warm blanket.
• He’s been cosying up to the new manager all week.
• They spent the evening cosying together on the sofa.
• The politician was cosying up to wealthy donors.
• We were cosying around the campfire telling stories.