Slab – Highway
Superslab – divided highway with 4 or more lanes
Squid – Generally I think of this as someone who engages in unsafe riding behaviors, though I do not think that not going ATGATT is necessarily indicative of squidishness. Also, I think that this may have an origin in military slang- can someone confirm?
Lid – half helmet
Shortie – half helmet
BRC – Basic Rider Course
MSF – Motorcycle safety foundation
Geezerglide – ? I think that Elwood said this was an HD Ultraglide?