Burn the midnight oil and Sit up

Sit up and burn the midnight oil are semantically related. In some cases you can replace term "Sit up" with "Burn the midnight oil", this terms are similar.

Sit up verb - Change to an upright sitting position.

Burn the midnight oil and sit up are semantically related. Sometimes you can replace phrase "Burn the midnight oil" with "Sit up", this terms are similar.