catch (one's) drift

To understand the meaning, insinuation, or implication of what one is saying. All I'm saying is that I won't be very sad if she breaks up with her boyfriend, if you catch my drift. A: "I want him 'taken care of'—he's become too much of a liability." B: "I think I catch your drift." If Jen didn't come home last night, then I bet she and Bill were preoccupied with some extracurricular activities, if you catch my drift.