blue-ball

verb2

1. •
   To lead someone on or tease them with the promise of something desirable without actually delivering it, causing them to feel frustrated and unsatisfied.

   • Stop blue-balling me and tell me what happened!
2. •
   (slang, vulgar) To leave (a person, usually a man) sexually frustrated by denying them an orgasm or abruptly ending sexual contact.

   • “Stop blue-balling the guy and give in already.” — 2009