Snides, or fakes.
Hydes was created in 1863.
Arthur Hydes was born in 1911.
Arthur Hydes died in 1990.
No.
Yes, English slang is.
Yes "yo" is English slang.
The Alabhama Hydes
There is no English slang word named ho-la.
Thomas Hydes Hardwicke has written: 'Management of man' 'Secrets of the driving test' -- subject(s): Automobile driving
"Blugh" is not a commonly recognized slang term. It is often used as an onomatopoeic expression to convey a sense of disgust, discomfort, or general displeasure.
That is not slang, it is a clear plastic sheet.
Yet is a proper English word. Yet is not a slang word.