OOF most commonly means "Out of Office" in a business context. However, it can also be used to mean "ow" or "ouch" ( The abbreviation OOF is typically seen in an automated email reply to notify people that a person is absent and unable to reply.
Explanation:
ahahh and just say it when you dont want to talk to sum1 lol
Emaciated is when someone is abnormally thin usually because they are starved or lacking food. The other 3 words are simply descriptive whereas emaciated could be used in an insulting way.