The time at which any individual of any age or gender (especially those under the legal drinking age) gets shitty-wasted and Hammered.

Shmammer time can be throughout any time of the day, especially in the extremely early hours of the morning (for minors= "late" hours of the night) and with anyone who is willing and capable of getting shmammered as well.

Warning: not suggested to get shmammered alone or if unintentionally knocked up.

When you eat dirt for the first time and leave your family to build a shack in the woods