squid

Etymology 1

Unknown. Perhaps a sailors' alteration of squirt.

noun

1. Any of several carnivorous marine cephalopod mollusks, of the order Teuthida, having a mantle, eight arms, and a pair of tentacles
2. A fishhook with a piece of bright lead, bone, or other substance fastened on its shank to imitate a squid.
3. (US, military, slang, mildly derogatory) A sailor in the Navy.
4. (UK, slang, humorous, rare) A quid; one pound sterling.
   Can you lend me five squid? I feel like a bacon sarnie.
   Press the fifty squid button – "Insufficient funds". […] A thousandth of a million squid or two monkeys / Or a whole fifty scores 2004, The Streets (lyrics and music), “It Was Supposed to Be So Easy”, in A Grand Don’t Come for Free

verb

1. (fishing) To fish with the kind of hook called a squid.
2. (parachuting) To cause squidding (an improper, partial, parachute inflation, that results in the sides of the parachute folding in on the center, and pulsating back and forth).

Etymology 2

Possibly a blend of stupid and quick; "stupid, quick, under-dressed and imminently dead", a claimed origin, is probably a backronym.

noun

1. (slang, motorcycling, derogatory) A motorcyclist, especially a sport biker, characterized by reckless riding and lack of protective gear.
   "In my mind, a street squid is anyone who races on the street. Period."¹
   "squid: a cocky motorcyclist who darts very aggressively through traffic"²