1. slang An inexperienced and overconfident motorcycle rider who is unsafe and brazenly disregards the law. Look at that dope who just flew around the corner. No helmet, no pads, no boots—typical squid. Some squid came screaming down the highway, weaving in and out of traffic as he went.

2. slang A member of a navy. Working in a busy harbor town like this one, you get used to the rowdy squids who bring chaos every time they're on shore leave.