A court order requiring you to reveal and/or use your hoo-haw in a certain instance.
I dunno whether claiming to have received a subpoenis would stand up in court if you're accused of indecent exposure, but it's an interesting and novel thought.
A Subpoena actually or correctly is an order of a court which requires a person to be present at a certain time and place or suffer a penalty (subpoena means, literally, "under penalty"). This is the tool used by Court to ensure that witnesses present themselves at a given place, date and time to make themselves available to testify.
Subpeona, a horrid piece of paper that informs you that you have to go to court to give testimony. Commonly the cause of many heart attacks. Commonly opens with "You are hereby COMMANDED to appear."
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