B-macked
When you sit back and enjoy watching your ex's girlfriend get all hot and bothered right in front of you while you're still technically dating her
I saw your ex and her new girlfriend at the mall. You were still dating her. I laughed so hard I choked on my snack.
You were still with her when her ex came in and started flirting with her. You looked like a sad puppy.
You were at the park with her when her ex showed up. You got so mad you threw a squirrel out of a tree.