Top definition
a fish that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase.
TOM:
"That fish just emitted a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase."

PHIL:
"That's because it's a laser fish, dummy."
by Pierce Hite February 01, 2008
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