"Ballsack" is a crude English slang term that appeared in the 20th century, formed from "balls" (testicles) and "sack" (a pouch), literally describing the scrotum. The word is highly vulgar and primarily used in informal, sexual, or comedic contexts. While it is anatomically descriptive, it is considered offensive in polite conversation and is often employed to shock, insult, or generate humor rather than as a neutral term.

英語での「ballsack」の定義と意味

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