Watching David Firth's Jerry Jackson, I noticed that he often says "rate" and even writes it "r8". From the context of the usage I'm pretty sure he means "really" when he says that.
So I'm pretty sure this is a British colloquialism for "really", but I've never heard it outside of this cartoon. It might also be a local British colloquialism.
Can somebody clear this up for me? Is this really British English? Is it common for British to pronounce "really" like "rate"?