Bay Area (northern california) slang. Ghost riding dawhip is when you open your car door and get out and run along the side of your car when it's rolling.
Oh shittt mayn, did you see Mistah Fab ghost ride dawhip in his video for Ghost Ride It? Mistah Fab goes so dumbbb
A Japanese phrase tacked onto the end of sentences for emphasis and cute effect. Sometimes appears as "na no da," which has the same meaning. Made popular by the character Chichiri in the anime and manga Fushigi Yûgi, who uses it liberally. It is usually translated as "you know."