Simply, what kids (and adults) like to make after a good wet snowfall. Generally involves rolling snowball's until they get quite large, then stacking them one on top of the other - big one on the bottom (legs), middle size in the middle (midriff), and small one on top (head). Also usually includes other items to make them look more real. Normally is spelled as one word, snowman.
The kids and I went out today to build a snow man