noun

• (radio) A mixture of noise produced by the harmonics of continuous-wave stations.
• (surfing) The foam of a breaker.
  "And Rincon was all about surfing. Flash back thirty-odd years, to a skinny kid on a Styrofoam belly-board, pin-wheeling out into the mush of Jacksonville Beach, Florida."
• (geology) A magmatic body containing a significant proportion of crystals suspended in the liquid phase or melt.
• (MLE) A gun.
  "Do you want me to back out the mush, bruv?"

noun

• (rustic US) Cornmeal cooked in water and served as a porridge or as a thick sidedish like grits or mashed potatoes.
  "However, they did make and sometimes even bake cornmeal mushes that could be either sweetened or fortified with fat."

verb

• (intransitive) To walk, especially across the snow with dogs.
• (transitive) To drive dogs, usually pulling a sled, across the snow.
  "Together the two men loaded and lashed the sled. They warmed their hands for the last time, pulled on their mittens, and mushed the dogs over the bank and down to the river-trail."

noun

• (Quebec, slang) A magic mushroom.