Having sex with your neighbor.
My neighbor and I randomly fuck over fencing when necessary. (It's just a window knock away.)
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When the erect tip of a mans Penis "peeps" over the top of his trousers when it is tucked upwards in an attempt to conceal errection
"Dude, that guy was totally "peeping over the fence just then"
by Krazytex January 22, 2012
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