A mix of the words stoned and hammered. Refers to possibly the best state of being at any type of party setting, with common symptoms being elevated consciousness and the desire to make a complete fool of yourself, all in the name of a good time.
Damn, at the 4th of July party last night I had 6 shots of Jager and followed it with 3 tightly packed bowls of dank weed. Then, I proceeded to shotgun somewhere between 6 and 10 beers and went back outside to finish off the supply of bud. I concluded the night with a cocktail of vodka and coke, with a 2:1 ratio, respectively. Good lord, I was fucking stammered.
Stoned and drunk at the same time.
"Man, last night I got stammered."