Person who runs naked through a public place as a form of devilment.(noun)
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Use "streaker" in a sentence
"However, this streaker is impressive for another reason ..."
"Anybody who thinks a streaker is a sex offender is so dumb they should be banned from breeding."
"UPDATE: there were a lot of great commercials, but I think top props must be given to Budweiser, first for the 'streaker' ad, and then the "I Die From Teh Cute" award for the 'I won't tell if you won't' commercial, which had me clutching my insulin and howling."