Verb
blue-ball (third-person singular simple present blue-balls, present participle blue-balling, simple past and past participle blue-balled)
(slang, vulgar, transitive) To leave (a person, usually a man) sexually frustrated by denying them an orgasm or abruptly ending sexual contact.
(by extension, idiomatic, transitive) To lead someone on or tease them with the promise of something desirable without actually delivering it, causing them to feel frustrated and unsatisfied.
Synonyms: tease, lead on, tantalize
Stop blue balling me and tell me what happened!