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- 2There doesn't seem to be a single source, so I am not sure this question can be answered. There are multiple plausible interpretations out there but it is impossible to determine which is back-formation and which is the original source. The jargon file and wikipedia entries mention several possible explanations.jw013– jw0132014-08-07 17:22:21 +00:00Commented Aug 7, 2014 at 17:22
- 1Relevant historyjw013– jw0132014-08-09 05:12:15 +00:00Commented Aug 9, 2014 at 5:12
- 3(ha)shbang perhaps?captcha– captcha2014-11-11 10:35:48 +00:00Commented Nov 11, 2014 at 10:35
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