Think of 'fit up' as supplying practical items or equipment for a specific purpose or space. The charity aimed to fit up the community center with a new library.
Pro Tip 2/3
Complete Preparation
'Fit up' implies a thorough and complete preparation, leaving nothing out. Before opening day, we'll fit up the store with all the necessary goods.
Pro Tip 3/3
Positive Action
Using 'fit up' usually suggests a helpful and beneficial action for improvement. Volunteers worked tirelessly to fit up the old playground with new equipment.