hit a/the (brick) wall

informal

if you hit the wall when you are trying to achieve something, you reach a situation where you cannot make any more progress.

We've just about hit the wall in terms of what we can do to balance the budget.

The enquiry hit a brick wall of banking security.

• put your oar in
• put your own house in order
• put yourself in place
• put yourself in someone's place
• put yourself through
• put yourself through something
• put your shirt on
• put your shirt on something
• put your shoulder to the wheel
• put your thinking cap on
• put your two cents in
• put your two cents worth in
• puzzle out
• puzzle out something
• puzzle over
• puzzle over something
• Pyrrhic victory
• QED
• quantum leap
• queer fish
• queer pitch
• queer someone's pitch
• question mark over something
• queue-jump
• queue-jumper