1. an undisciplined soldier

2. a total lunatic, one who fights without fear of death or is impervious to pain, one who takes unreasonable risks just for the hell of it and delights in causing destruction and mayhem, see also berserker

3. someone obsessed with hiking

4. a beverage composed of 4 parts root beer and 1 part lemonade (and a sprig of mint if you're Martha-friggin'-Stewart)
1. Ray showed up for duty without polishing his boots. What a mosstrooper!

2. Ray just walked up and slapped that tiger. What a mosstrooper!

3. Ray has been walking for twelve hours. What a mosstrooper!

4. It's been a long day. I need a mosstrooper.
by foltor August 08, 2005

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