I've never heard it called that before

短语

发音

其它

释义与例句

phr.
  1. 1.

    Used to draw attention to a possible, and usually unintentional, double entendre in the immediately preceding utterance of another speaker.

    非正式

词源

The word "it" refers to a sex act, bodily organ, etc. for which the speaker's phrase might be construed as a euphemism.

来源：wiktionary