A gaff — a home, flat, or situation — that gives off deeply suspicious energy. A sus gaff is the kind of place where you arrive and immediately feel something is off: the vibe is weird, the host is acting cagey, and you're not sure you should have come. It might be a party where you don't know half the people and the other half are acting sketchy. It might be a flat that just feels wrong somehow — too quiet, curtains always drawn. Sus gaff is the slang for when your gut says leave early.
Walked in and it was just a sus gaff from the start — no music, everyone whispering, the host wouldn't make eye contact.
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