Cardboard hot pocket

When something or someone appears appealing on the outside, but once you "bite in", you realize there is nothing of worth.

Mike: hey man, how did your date with that girl go last night?
Dave: she was attractive and all, but she couldn't hold a conversation for shit, and when she did talk it was just very dry and boring... she was a real cardboard hot pocket...

Sigxiety

The acute emotional frustration and mild rage experienced when a traffic light transitions from green to yellow to red just as you approach the intersection, forcing an unexpected and irritating stop.

“As I sped toward the intersection, the dreaded sigxiety hit when the light turned yellow just as I was about to pass through, forcing me to slam on the brakes.”