What is Rookie Mistake?
1.
Falling in love with a girl prematurely.
"Man! Look at that idiot! He fell for that slut after one night! She totally blew him off!"
"What a fool. It must be his first time with a girl."
"True man. We've all made those rookie mistakes."
See
2.
An egregious error (or altogether unwitting, on the other end of the spectrum of awareness) resulting in a response ranging from a harmless prank to serious vandalism (Localized to York, PA)
It was a major rookie mistake for him to leave his car door open!
