My reaction when I am teasing someone but they get nothing in the end, I just get some fun like when you give candy to a kid and then take it away.  In this gif you see Aubrey Plaza crossing her legs and smiling… She looks sexy and she is just a tease, for a second you believe you are going to get a peak of her underwear, but you end with nothing.

You can use this gif to reply messages where you want people to believe they are going to see a sexy girl showing some panties but you want to cock block them