An incorrect rendering of the term "best friend," which means one's principal and closest companion.
Person 1: Hey, I was talking to my bestfriend the other day, and--
Grammarian: Your bestfriend? You mean "best friend"?
Person 1: ...
Grammarian: Your bestfriend? You mean "best friend"?
Person 1: ...
by Grammarian7 June 30, 2011