Your mama can ask me for my autograph
Cause that cougar's a MILF, she's the oldest trick in the book
But I sure would fall for that

from Eminem (Ft. X Ambassadors) – Wicked Ways Lyrics on Rap Genius

Meaning

A word play on “trick” meaning “whore”. “The Oldest Trick in the Book” is an idiom that refers to a deception or joke that should be obvious and avoidable to the person being schemed because the trick has been pulled so many times in the past. Even though the your mom is older, Eminem would still fall for her because she is a MILF:

http://www.youtube.com/watch?v=iBN_SUfW2OM

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