(n.) When something is so unbelievably cute that it leads you to say "awe." A play on the idea that orgasms are an extreme state of pleasure, "awegasm" represents a moment when one is overcome by an extreme level of cuteness.
When I stopped at the pet store today I had an awegasm while I was playing with the kitties.
Upon seeing my girlfriend's new facebook default, I had an awegasm. :3