Does GAF mean house?

Yes, in certain slang contexts, GAF does mean house, but it is spelled more commonly as gaff with double f and pronounced the same. In UK slang, Irish slang, and Australian slang, particularly in London, Dublin, and working-class English, gaff or gaf is a very common informal word for house, flat, apartment, or place where someone lives. For example, someone might say come round to my gaff meaning come to my house, we had a party at his gaff, or is your gaff free meaning is your house empty so we can hang out. The spelling gaf is often used in quick texting and social media as shorthand for gaff because people drop the second f when typing fast. The term originates from 19th-century British Romani and thieves cant where gaff meant a cheap theatre, fair, or dwelling, and it became deeply embedded in Irish and British slang. In this slang usage, GAF meaning house is neutral and not offensive, used daily by young people. However, GAF also has many other meanings that do not mean house, such as GAF Materials Corporation the roofing manufacturer, German Air Force in NATO documents, Government Aircraft Factory in Australia historically, and vulgar slang give a fuck. So whether GAF means house depends on context, if someone in a UK or Irish conversation says my gaf, they almost certainly mean my house, but if someone in a roofing context says GAF, they mean the shingle manufacturer.