A moment by which you just realized you forgot something.
Dammit I forgot to use that coupon for a million dollars off! Dammit moment.
1 more definition
A short but embarassing moment in which something completely unexpected and bad happens to you.
I had a really bad dammit moment when my girlfriend and I were hooking up and my mom sent me an annoying text message while my phone was on. Anither dammit moment happened when I farted while we were having anal sex.