usually in combination: person in charge of or employed at a particular thing
"a kitchen wallah"
"the book wallah"
A servant or other person responsible for something, often specified before it, for example kitchen wallah.
by God (Allah); may God be my witness used in making a solemn oath
Misspelling of voilà.
The suffix "-wallah" likely comes from Hindi, where it originally meant "pertaining to" or referred to a "person in charge." It is used to denote someone who performs a specific job or has a particular characteristic.