wouldn't know (something) if it hit (you) in the face

to not notice something although it is very obvious.

Julie wouldn't know a good deal if it hit her in the face!

• put your heart into something
• put your house in order
• put your life in hands
• put your life in someone's hands
• put your life on the line
• put your mind to it
• put your money on someone
• put your money on something
• put your money where mouth is
• put your money where your mouth is
• put your neck on the block
• 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