Carbon/carbonite filters are used for all sorts of purification. Lately, carbonite filters have been used on bongs. The smoke goes through the carbonite rock, removing carcinogens and other toxins, but not removing the THC. This means you won't cough as much. Regular carbon filters are replaced, while the built in Carbonite brand ones can be cleaned and maintained. It doesn't magically make more THC in your smoke, like the other definition suggests.
Guy: "Oh my god is this coke from Burger King"
Same Guy: *sips the drink and then realizes what it is*
That same guy:"Oh what is that? That's carbonated poop water."
The feeling of something getting on your last nerve, of feeling like you can't take it anymore, of being anxious or fed up to the point where you feel like a soda can shaken up and then not released.
Bertha: "Hey, Hortense, you seem a little tense."
Hortense: "It's that damn break-room door. I've been hearing it all day. 'Squeak, fweee! Squeak, FWEEET! Fwee!'"