Tight shorts in general on males. So tight that
testicles are bulging in the crotch. It gives the
appearance as if the wearer is
smuggling plums in his shorts. Hence the name "Plum smugglers". These shorts are often worn by American tourists abroad.
"Damn, how can you fit
your balls in those plum smugglers?"
American tourists usually wear the plum smugglers with a pair of
birkenstocks (sometimes worn with socks).
Lt. Dangle from the show Reno 911
integrated the plum smugglers into his uniform.