Grape Smugglers are very small speedo trunks which hug the bollocks of the male wearer in a manner which makes it seem that they are "smuggling grapes" between their legs.
Often seen on European, particularly French, males.
A person, typically a male, wearing any sort of tightly constrained over garment which appends tightly to the genitals, leaving their shape noticeable.
When the race was finished, Jared dis-engaged his Schwinn only realize he was truely a grape smugler in his speedo.
An item of male clothing, usually very tight pants, i.e. those worn by rodeo fans; or Speedo trunks, that leave very little to the imagination when it comes to 'the package'.
You need the shield-sized belt buckle to offset the risk of a direct hit when wearing grape smugglers.