Top Definition
The male form of granny panties.

The said "grampy panties" are similar to tidy whities; the panty line is easily discerned through any loose clothing, like basketball shorts, especially if the clothing is a light color. They ride up and make uncomfortable and particulary ass-noying wedgies that, when picked, decrease the overall manly dignity to a measly amount.

Those who wear grampy panties are subject to immediate mockery when the panty line is spotted. If you are discovered as a grampy-wearer, head to the nearest bathroom and remove the grampies and place them in the toilet, so that no-one can make fun of you any longer. Just make sure your name is not written on the tag.
"Dang, check out his grampies!"

"NUMBER 7 IS SEEN SPORTING WHITE SHORTS, EMBARRASSINGLY REVEALING HIS EXTRA-LARGE GRAMPY PANTIES."
by Mury&Hanyah[[: October 19, 2009

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