noun

• (countable) The sound or action of something, especially something moist, being squeezed or crushed.
  "Alex reached the bottom and Grant heard a squish as she landed in the mud on the bottom of the river."
• (countable, politics, informal, derogatory) A political moderate.
  "Some conservatives think that in the long run, the party will be better off without squishes like Specter […]"
• (uncountable, UK, slang, archaic) Marmalade.
  "Where they are loaves and joints melt as snow in the sunshine; bowls of cream are of no more account than acorn-cups filled with dew; and the 'squish'—as they call the mother's home-made marmalade—has to be renewed daily; […]"

verb

• (transitive, informal) To squeeze, compress, or crush (especially something moist).
  "The sandwich tasted fine, even though it had got squished in his lunchbox."
• (intransitive, informal) To be compressed or squeezed.
  "I kicked off my shoes and wiggled my toes on the soft moss. It felt amazing as it squished between my toes, […]"

noun

• (slang) A non-romantic and generally non-sexual infatuation with somebody one is not dating, or the object of that infatuation; a platonic crush.