v, hunt members of the opposite sex, with copulation in mind. The easiest way to spot someone who is sharking is to watch their friends, who will every so often hold one hand just above their head like a fin just to make the point. The difference between sharking and being “on the pull” is that sharking is slightly more proactive. If you’re on the pull you won’t say no; if you’re sharking you won’t take no for an answer. I was once told that “shark” in U.S. slang is, erm, a sexual technique. I then tried and failed to describe the act itself in polite terms, and have subsequently given up.