Add “Naked”…no fairings. Less aerodynamic, but more visceral. See Monster, Ducati for more info. Note the “Fairings” and “Naked” are usually only discussed in terms of sportbikes…Harleys are not considered naked bikes for instance.
For “Squid”, I always make it more encompassing when I define it…to me, it’s not just hotheads on sportbikes but also guys on Harleys in (inevitably HD) t-shirts, half-helmets and fingerless gloves.
And ’cause I love ’em: “Cafe Racer”…a minimalist, stripped down style of proto-sportbike popular in Europe in the 1950s/60s, currently making a comeback. So named because British bikers would race them from roadside cafe to cafe. (see “Naked”).
On the more humorous side:
“Crotch rocket” – to cruiser riders and the general population, any sportbike, often of Japanese origin.
“Metric bike” – what Harley riders call cruisers made by foreign companies.
“Oldwing” – what sportbike riders call touring bikes. Comes from preeminence of the Honda Goldwing in this segment.