Английский словарь американских идиом - leave flat

{v. phr.}, {informal} To quit or leave suddenly without warning when wanted or needed; desert; forsake; abandon. * /Sam found that being a member of the trail-clearing group was a lot of hard work, so he left them flat./ * /My car ran out of gas and left me flat, ten miles from town./ Compare: LEAVE IN THE LURCH, WALK OUT(2).