drop/fall into somebody's lap(redirected from dump into lap)
drop into (one's) lap
To be given to one or become available to one through sheer chance, rather than hard work, etc. Because she's the daughter of a CEO, I'm sure great opportunities just drop into her lap.
fall into (one's) lap
To be received unexpectedly or without effort. I didn't steal the internship from you—it fell into my lap, I swear! Your aunt has decided to get a new car, so her old one might fall into your lap.