A fun phrase to say when somebody is eating something, the original usage of this word began as "nom nom nom" and was largely used online for lawlcats and the like. After thepopularity of "dot com" in song and web, the dot com was added largely because it rhymed.
1. The food eaten before a school dance.
2. The face eaten during or after a school dance. (Note that it is inadvisable to say the word while in the act of doing it. That's creepy.)
1. You took her to taco bell before prom? That's some pretty low-class prom nom nom
2. Dude, you made out on the balcony the whole time. Epic prom nom nom.