Flirting or being flirtatious.

I couldn’t care less (but one must keep up appearances, right?)

Talking sweet to someone you like.

1. To be in the honeymoon phase of a courtship or relationship; when a couple is engaged in public displays of affection and/or being anti-social by only paying attention to one another during a social outting with a group of friends. 2. When a guy or a girl chooses to spend time with a love interest over their friends. However, this term is more commonly used to describe men who become MIA (missing in action) after getting with a girl or getting into a relationship.

leaving a large group of your male friends, to go to another room and talk for prolonged periods of time with a girlfriend or girl you are interested in.

cup caking means flirting with another person doing anything leading up to, and excluding sex.

adjective: a word used to describe the act of talking on the phone with a significant other with romantic or affectionate content, usually with funny cute nick names or words.