Lebenskuss

kiss of life. 1) If you give someone the kiss of life you put your mouth onto their mouth and breathe into their lungs to make them start breathing again, for example because they have nearly drowned.
(She pulled him out of the lake and gave him the kiss of life.)

2) The kiss of life is something which gives new life or energy to something else which is failing.
(Government investment would be the kiss of life to the coal industry.)

entnommen aus: Collins Cobuild English Language Dictionary, 1998, Seite 798