Английский словарь американских идиом - drop off

{v.} 1. To take (someone or something) part of the way you are going. * /Joe asked Mrs. Jones to drop him off at the library on her way downtown./ 2. To go to sleep. * /Jimmy was thinking of his birthday party as he dropped off to sleep./ 3. To die. * /The patient dropped off in his sleep./ 4. or fall off To become less. * /Business picked up in the stores during December, but dropped off again after Christmas./ Contrast PICK UP(14).