Is there an English slang word for for the activity to distract and annoy the opponent during a game?
It turns out to be "cheapo tactics"
FIDE Laws of Chess
11.5
It is forbidden to distract or annoy the opponent in any manner whatsoever. This includes unreasonable claims, unreasonable offers of a draw or the introduction of a source of noise into the playing area.
You got it right: "distract or annoy"
There's word against it: to report
Most opponents distract and annoy me by playing better or faster moves. I protest all such behavior.
I think it's more gamesmanship (as opposed to sportsmanship).
Cheapo tactics is just a swindle attempt, I think.
