TBM

Total Boner Move: Noun

A blunder, a screwup, a move that a "boner" would make.

In this sense, boner is not a sexual reference, but more of a reference to someone who is a "doofus" or a "bonehead"

Did you hear that Landon spilled the beans about the surprse party that Sam was setting up for Jenny?
Yeah, TBM

So, I heard David was cheating on his homework, and he accidentally emailed the professor to ask for a paper to copy off of
That was such a TBM by David

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