(slang) A cramp-like ache in the testicles and prostate region caused by prolonged sexual arousal; testicles experiencing such an ache. / (slang, figuratively) Unfulfilled sexual desire.

Third-person singular simple present indicative form of blue-ball

Sexually frustrated.

simple past tense and past participle of blue-ball

present participle of blue-ball

(slang, vulgar, transitive) To leave (a person, usually a man) sexually frustrated by denying them an orgasm or abruptly ending sexual contact.