This word was commonly used in the British magazine PC Gamer and later spread from their official forums to several IRC channels and other forums.
When someone would make a joke that is funny as well as slighting shocking (although this last part has become optional) people would reply with a simple "Arf!"
Term meaning a person of African decent who cannot swim or swim well. Derived from the acronym A.R.F. which stands for African Rock Fish. Used by lifeguards or ride attendants in the U.S. northeast who generally work at the jersey shore or water parks near large urban areas.
African refugee face. The face that you make when you are embarrassed. It looks like an upside down grin, you make this face when you are in an awkward situation. This face looks like a person of african descent when trying to smile in a photo.
An abbreviation standing for Adolescent Rat Fart. Someone who is an ARF is annoying, EGOTISTICAL, loud-mouthed, short-tempered, immature, and speaks with an entitled, undeserved authority about subjects they know little to nothing about. They may or may not be prone to dressing in a ridiculous costume while doing so. They are likely to overstate their own abilities while downplaying the skills and accomplishments of others. If you encounter an ARF, your only hope is to run away as fast as you can, and pray they don't take chase.