An atheist is a person who does not believe in any sort of deity. Though this does not neccessarily precipitate smugness, it can often lead to it. Atheists however are impossible to stereotype just as any person of any other faith is impossible to stereotype due to the wide nature of this group.
understand,appreciate actively and profoundly, fully comprehend; also, to think about, listen to, play, or contemplate something or someone with full love and understanding, even ecstacy. Often done stoned.
(s)he spent the whole museum visit just grocking one painting. I go to the park to grock the trees. MCEscher really grocked Goedel's theorem.