Bad grammar. Put the apostrophe in twins uncle to make it make sense.
Twins uncle has no meaning, but twin's uncle means the uncle of a twin.
by Word of the Day May 29, 2004
he is able to fo anything in the twins imagination. he has everything you could possibly have. a ficticious character mad eup by the twins. he is an extremely rich and has a mile long house with 20 harley davidsons, all brand new.
have you met the twins uncle. NO CAUSE HE IS A LOAD OF BULLSHIT
by Tom May 27, 2004