Someone who steals your
free time and replaces it with work or
tedious conversation, often when he/she is unaware of doing it. Typically either someone deceptively nice (so you feel guilty about walking away), or
your boss (so you can't leave).
Friend 1: Hey are you coming fishing on Saturday?
You: I'd like to, but before I leave the office my boss will
probably ask me to come in and work over the weekend. He's a
usurper.
Boss: Hi, Peter. What's happening?
We need to talk about your
TPS reports.