Silly Boys Trucks Are For Girls
A snowclone is a phrase that is produced by using a clichéd phrase as a linguistic template. The template for the above snowclone is: Silly X, Y are for Z. And in case the original clichéd phrase is escaping you, here it is:
The word snowclone was coined by a Language Log reader as a label for these phrases based on the mistaken belief that Eskimos have an unusually large number of words for snow.
“If Eskimos have N words for snow, X surely have Y words for Z.”