Even in the corporate world people get it wrong. It's so annoying.
Their = plural use of "they", ex. "It's their turn to pay for dinner, I paid for those bitched last week."
Their = indefinate singular, ex. "some bitch left their bill with out paying."
They're = conjunction of They and Are, ex, "They're the must stupid bitches I've ever met."
There = location (physical or not), ex. "those bitches were there last night and didn't pay for a thing."
Were= verb of "be" (plural past) ex. " we were going to go to dinner, but those bitches stood us up."
We're = conjunction of we and are, ex. "we're gonna get those bitches back tonight."
where = location, ex. "I don't know where we're going but shit's going down."
was= 1st adn 3rd person form of "be", ex. I was gonig to pay but those bitches don't deserve a free meal."
I was an english minor in college, at least some of what I studied paid off. Of course this is coming from the girl who wrote "unrelevant" instead of "irrelevant".