Squishy is in reference to the baby jellyfish that Dori, the blue fish in Finding Nemo, names.
"I shall call him Squishy and he shall be mine and he shall by my Squishy. Come here, Squishy. Come here, little Squishy. Goo Chee Goo Chee Goo. ---OW!!! Bad Squishy! Bad Squishy!" - Dori
Pat Lin Shu named Clinton Green her Squishy because she was bored one day... a day in which she saw Finding Nemo and now Clinty Boy is also named Squishy.
Just a really skanky sperm dump. Looks for rich looking drunks for one night stands, just so they have shelter. Hint:They usually don't wear panties and smell like an organic solvent.
When thigh fat is visibly squished in by stockings or long socks. The uncovered part of the thigh will look thiccer than the covered part making it look like the thigh is "squished." Thigh squishes often appear on anime/hentai school girl characters.