for example a guy might start out being really attentive to a girl he wants to go out with: lots of emails, text messages, dates, flowers etc... and then once the girl has committed to the guy in some way he turns off the attention and hardly ever calls, no more flowers, hard to get hold of etc...
Girl 2: Sounds like he did a bait and switch on you.
You: I'll take it.
*bill arrives without the really good plan*
Friend - "looks like she pulled the old bait and switch on you bro. Bitches be doing that to get a ring on it"