This category is for the dubious exploitation of bugs, abuse of game mechanics, and other behaviors that are generally frowned upon. If it's unclear as to whether a behavior falls under the term cheating, it should probably be included anyway.
“When playing NetHack on a local machine (ie. not on a public server such as NAO), it is possible...Save scumming
“Cheating is the act of doing things not intended by developers or considered to be against the...Cheating
“Start scumming is a simple abuse that involves immediately quitting characters that do not meet...Start scumming
“A 1-turn ascension is possible in wizard mode: Level teleport (Ctrl + v) to the Plane of Earth...1-turn ascension
“Farming is any kind of repetitive behavior which is felt to be against the spirit of the game...Farming
“The Astral call bug is a fairly serious loophole in NetHack's handling of the call command when...Astral call bug
“If the game is in wizard mode, the message "You are a very tricky wizard, it seems." is printed...Trickery