Anti-shit-gasm
When you think you need to take a dump, go and sit on the toilet for minutes, nothing comes out, so you stand up and leave feeling somewhat unaccomplished and awkward.
Geoff: Dude I just took a 3 minute sitter
Bill: I know how you feel, I had an Anti-shit-gasm myself this morning
Geoff: Did you flush? I never know whether to flush
Bill: I know how you feel, I had an Anti-shit-gasm myself this morning
Geoff: Did you flush? I never know whether to flush