From Longman Dictionary of Contemporary Englishlet yourself in for somethinglet yourself in for somethinginformalPROBLEM to do something that will cause you a lot of trouble I don’t think Carol realizes what she’s letting herself in for. → let
Examples from the Corpus
let yourself in for something• He was probably right, but I wondered what we were letting ourselves in for.• I took his point and wondered what I had let myself in for.• It is important that people are aware what they are letting themselves in for.• Thistle's early season promise has evaporated, and debutant Julian Broddle must be wondering what he's let himself in for.• What exactly was I letting myself in for?• What have I let myself in for?• We must know what we are letting ourselves in for, theoretically, when we use such measures.• Property: Don't let yourself in for trouble Choosing the right agent is essential if you want to rent your property. 