- keep something up
- keep something up†1. Lit. to hold or prop something up. •
Keep your side of the trunk up. Don't let it sag.
•Keep up your side of the trunk.
2. Fig. to continue doing something. •I love your singing. Don't stop. Keep it up.
•Please keep up your singing.
3. Fig. to maintain something in good order. •I'm glad you keep the exterior of your house up.
•You keep up your house nicely.
Dictionary of American idioms. 2013.