To say Thank you in a shorter way.

Always ending with a capital X and starting with a lowercase f.

As in

faX = phanks = fanks = thanks = thank you

Urban DictionaryFax is what gay retards otherwise known as gaytards say because they aren't as elite as people who say Facs

Like in the car commercials for Carfax where it has the information on the car like how many owners wrecks and problems. Muff Fax is the info on a girls muff and how many "owners'' or problems like std's or anything undesirable.

A females previous sex and hookup history , if she has a salvage title she has an std or some nasty type of disease

A type of punking in which one faxes another person or entity an all-black piece of paper with the intention of purposefully depleting their fax toner cartridge.

To send a fax, generally many pages in length, of a solid black image. The intent is that the recipient's fax machine will run out of ink or toner, or possibly even break.

A more exclaimed and stronger form of fax. Used when pointing out something so true it is neither true nor fax.