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1.
Someone who is quick to make a suggestion about what to do or what he would have done in a situation that has already happened.
Bill: Yea, I opened my car window and forgot that my application was sitting on the seat, and it blew right out the window.

Dan: What I always do is before opening my window is look around and see if there is anything that can blow out.

Bill: (Thinking) What a hindsighter you are.
by BillyBuggy March 14, 2011