Misc: Geronimo’s Apache name was Goyathlay. What does Goyathlay mean in English?

Questions

Speaking of underwear, what does bvd stand for?

Speech disorder characterized by involuntary hesitations & rapid repetitions of speech elements (speech & speech disorders)?

Speed racer was a "demon on wheels," but what was the name of his car?

Spike Lee's _____ is released to critical acclaim?

Spiral staircases in medieval castles are running in what direction?