not exactly

1. Not quite; not too far from the truth. A: "So you'll be moving back to the city for the new job then?" B: "Not exactly. The wife and kids will stay where they are, and I'll commute back to them for the weekends." A: "Does that make me the manager?" B: "Not exactly—more like a co-manager with Ken."

2. Used sarcastically or ironically to mean "not at all." What do you think of the painting? I'm not exactly Picasso, but I think it turned out pretty well. They won't exactly be pleased to see us after the way the last dinner party went.

not exactly

(spoken)
1 used when you are saying the opposite of what you really mean: He wasn’t exactly pleased to see us — in fact he refused to open the door. ♢ It’s not exactly beautiful, is it? (= it’s ugly)
2 used when you are correcting something that somebody has said: ‘So he told you you’d got the job?’ ‘Not exactly, but he said they were impressed with me.’