1. overwhelm with too much of something
I'm swamped with work at the moment
As a noun, a 'swamp' refers to ground where still water collects such as a bog or a marsh. As a verb to 'swamp' means to overwhelm, usually, with too much work or information. This is an informal expression but you will find it used in social and professional contexts. You might hear someone say 'I am swamped' if they want to communicate that they are very busy, for example.