keep your nose to the grindstone

Meaning

1. to work hard for a long period of time without stopping

From the same entry

• cut off your nose to spite your face
• get up nose
• have your nose in
• have a nose round
• keep your nose clean
• keep your nose out of
• look down your nose at
• nose to tail
• on the nose
• poke your nose into
• put nose out of joint
• turn your nose up at