She smiled flirtishly at him across the room.

She has a flirtish personality.

She gave him a flirtsome smile.

She is such a flirtaholic, always flirting with everyone she meets.

Flirtaholics are always looking for new romantic connections.

Her flirtishness was evident in the way she batted her eyelashes and smiled coyly.

She gave him a flirtational smile.

She is known for her flirtationless personality.

She is a flirtable person.

She couldn't resist his flirtery.