A "Squid" is a term used to describe a girl or group of girls. Similar to the common term "Pig", a "Squid" is a girl who is not fat but simply unnatractive overall. Squids are not to be confused with "Butter-Faces". Squids do not have nice bodies, they tend to be flatter than usual. Squids have been known to travels in packs, often seen at bachelorette gatherings and dimly lit bars.
"Look at that squid accross the bar"
"What a squid"
"I can't believe you hooked up with that squid last night"