"Have a Fucking Terrible Summer." The alternative to writing
HAGS (Have a Great Summer) in someone's
yearbook. Can be done in
jest to a friend or to someone you actually hate. In the latter case you typically wouldn't tell the person what it means.
Billy: "HAFTS... what does that mean?"
Bob: "Have a fucking terrible summer. You know I'm
just joking!"
Mandy: "I wrote HAFTS in her
yearbook; she has no idea what it means!"