p-
dub is short for P-W, short for Pek-Wek, which is slang for the word 'Paki' - the politically incorrect term that is overused in society to describe brown people (Pakistani, Indian, etc) by the culturally insenstive and ignorant.
The shortened 'p-
dub' is considered more descriptive that derogatory, and is used regularly within the Canadian p-
dub community as a term of endearment.