1 definition by cleverunusedname
The right a man has to see his female friend's nether regions because he had seen them before they were friends.
Bill: " What the hell man, you saw my girl naked?!"
Ted: " It's cool man, I've been clamfathered in."
Ted: " It's cool man, I've been clamfathered in."
by cleverunusedname May 3, 2014