In honour of the Canadiens as opponents tonight here's a French fact: did you know that "boucher" in French can mean either "butcher" or "plug (noun) / to plug (verb)"? Both are pretty appropriate.
Plug (noun) is actually "bouchon" in French.
Plug (verb) is "boucher", you're right about that.
"Boucher" (noun) does = butcher, as you wrote.
2 out of 3 is a passing grade.
PS: As a bonus, I'll add that "boucher quelqu'un" = shut up someone (usually by stating a fact that can't be contradicted).