Singular you - "you was" or "you were"? [closed]

It's impossible to answer this without context. Using "was" (when "were" would be the correct form) may be locally idiomatic, or ironic, or stylistic, or just poor English.

For example, a common idiomatic usage is:

We wuz robbed!
Also, we was robbed or we were robbed. We were cheated out of a victory; we were tricked or outsmarted. For example, That ball was inside the lines—we wuz robbed! This expression, with its attempt to render nonstandard speech, has been attributed to fight manager Joe Jacobs (1896–1940), who uttered it on June 21, 1932, after his client, Max Schmeling, had clearly out-boxed Jack Sharkey, only to have the heavy-weight title awarded to Sharkey. It is still used, most often in a sports context.