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1.
Used to describe any untimely or unnecessary expenditure of effort or money.

Adapted from Shakespeare (Merchant of Venice), and in that day roads were in far better shape during the summer months, so mending roads in summertime was considered redundant.
Guy 1: "I'd better review for my phsychology exam"

Guy 2: "Study for a class that easy? That's like mending roads in summertime!"
by TreeWeezel November 15, 2010
15 4