Inspired by the movie knocked up with their smishsmortion clinic and a long night of drinking. Its the level of drunk past being hammered but before being totaly wasted. Originates from the Le Cordon Bleu, Las Vegas.
-Smish Smosh(ed)- Synonym(s) for drunk, high, wasted, or smashed, this term/phrase is typically used by prissy girls such as cheerleaders or sorority members. Often preceded by the word totally or so. To do in excess.
Meaning a delirious state of intoxicated happiness. A euphoric version of "smashed". Popularised in the French Alps, and holds great connections with Après-ski (the act of getting "smished" after a hard day's skiing).