come to a dead end
come to a dead endand reach a dead end
1. Lit. to reach a point where one can go no farther and can turn in no new direction. The road comes to a dead end about a mile farther.
2. Fig. to have run out of possible ideas, solutions, energy, etc. I've come to a dead end. I'm fresh out of ideas. The committee reached a dead end on the matter and tabled the whole business.