Cab is doing a trick while switch. A rodeo is a backflip with a BS180? in it.
I could be wrong though, im sure Ill get corrected if I am :P
Cab is any switch frontside spin, just a shorthand way to say it.
Rodeo I believe you are correct on, but I don't think it necessarily has to be BS180, could be FS also. Basically an inverted spin.