Big balls -> huge testicles

Posted under Tags

This is what their wiki page says:

e621 said:

Big Balls describes a character with noticeably large balls, but more or less within the realm of realism or believably. While the tag is subjective, and is applied to a range of "believably large" testicle sizes, big balls should generally be not much larger than the character's fist.

(but in typical e621 fashion it seems to be used on everything from regular-sized to huge balls).