look up any word, like swag:
 
1.
A word meaning hello. It is commonly used by French speaking Canadians, predominantly found in Quebec. It is used interchangeably when speaking English or French.
Allo, commence ca va?

Allo, how are you?
by DynamicEyes December 19, 2006
 
2.
Casual way of saying 'hello'.
"Allo. How you doing?"
by Yhtomit December 17, 2006