Background vocals used in film, TV, audio dramas, and other sound productions to give depth to the scene. For instance, people chatting in the background at a restaurant, or the sound of children playing at the park. Basically, the vocal equivalent of extras on screen.
The studio hired extra actors to perform walla to make the mall scene more convincing.
by BlueAngel September 1, 2006
The work many people say / mispell in place of the French word - "voilà" which means (in English) "here it is".

"Walla" is a word used by ignorant people (particularly Americans) who simply don't know any better.
I was looking for my pen and voilà, here it is.
by Paul December 7, 2004
"I swear to God. "

Is Aussie slang for "ha-allah" which means Swear To God in Islam, Arabic or something.
" Did she really say that?!"
"Walla."

"omg that was awesome!"
"Walla mate!"
by JessMiester May 28, 2006
A word from Witch Doctor Cartoons music !
Witch Doctor, give us the magic word !
uuh eeh uh ah ah ting tang walla walla bing bang
by Vicent June 20, 2006
walla is another word for hello.

Most used by pakistanish/indish people who are greating eachother.
Walla scpha , ke paza tio?!1! me pwns aiight , BOOCHA! jalla jalla m4n, me got tepee 4 j00r bumhole
by Darcus January 6, 2003
For your information, "retarded American", walla is an actual word. It is on the Scripps National Spelling Bee school spelling bee word list for the 8th grade, and you can look that up right now. Yes, you were just roasted by a 7th grader. But the actual definition is, "A person who is associated with a particular type of work or who performs a specific duty or service." If you're going to make fun of someone, at least check your facts first; if you're not going to you end up sounding stupid.
I flagged a rickshaw walla and he gave me a ride to my hotel.
by mkfitzgerald January 5, 2017