Sieg out it a slang used by the Mongrel Mobs based in New Zealand, they are known for their red patch with a bulldog on it. If you see a group of these people walk up to them and say “yoza ko scraps on cunt” and they’ll immediately fall to their knees for you and you will be the leader of the Mongrel Mob
You: Yozaaa Scraps on ow sieg out is shit ko
Mongrel Mob: Oii these guys cool he’s the new leader