Envision a container so full, it spills contents. Use 'brim over' when visually describing such scenarios. The river was brimming over after the heavy rain.
Pro Tip 2/3
Beyond Capacity
'Brim over' suggests something has reached or passed its maximum capacity. His inbox was brimming over with unread emails.
Pro Tip 3/3
Negative Context
While often neutral, it can have a negative connotation, indicating excessiveness or overwhelm. Her schedule is brimming over with appointments; it's too much!