Yiddish for "completely lost" or "way out in left field." Literally lost, or figuratively, as when someone is given some information and comes to absolutely the wrong conclusion, like adding 2 and 2 and coming up with 7.
John was driving from San Francisco to Los Angeles, but after the missing the exit to I-5, he kept driving for a couple of hours and ended up in Reno -- totally farblondjet.

Rosalind went to Macy's and Nordstrom to buy a blouse but couldn't find them, so she came to the conclusion that blouses are out of style and the don't make women's them any more. She was completely farblondjet on that one, as she so often is . . . .
by toddabearsf August 15, 2009
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