See: from the sublime to the ridiculous

• put your neck on the line
• 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