pull (your) socks up

to make an effort to improve your work or behaviour because it is not good enough.

He's going to have to pull his socks up if he wants to stay in the team.

• put paid to
• put paid to something
• put pen to paper
• put pressure on
• put pressure on someone
• put pressure on something
• put right
• put shirt on
• put shirt on something
• put shoulder to the wheel
• put someone at odds with
• put someone at odds with someone
• put someone back on track
• put someone in a hole
• put someone in mind of
• put someone in mind of someone
• put someone in mind of something
• put someone in place
• put someone in their place
• put someone in the picture
• put someone in the shade
• put someone off stride
• put someone off their stride
• put someone off the scent
• put someone on a collision course