yoyo mode = Y = zap

Yu-Shiang Whole Fish /yoo-shyang hohl fish/ n. obs.

The character gamma (extended SAIL ASCII 0001001), which with a loop in its tail looks like a little fish swimming down the page. The term is actually the name of a Chinese dish in which a fish is cooked whole (not parsed) and covered with Yu-Shiang (or Yu-Hsiang) sauce. Usage: primarily by people on the MIT LISP Machine, which could display this character on the screen. Tends to elicit incredulity from people who hear about it second-hand.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.

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