Going without undershorts, said of a
male, so called because his balls
hang free and unencumbered. A similar expression is "going commando," which can be used of either a male or
female without underwear, but is more often used of a male.
"A lot of guys like to freeball in the
summer, but I prefer jockey shorts, to give my balls a little support, since otherwise they
hang too low in
the heat. I do freeball if I'm anticipating a sexual encounter, however!"