Definitions

Caustic Carter? Let me define it using the infinite wisdom of Answers.com :

Caustic:

2. Corrosive and bitingly trenchant; cutting. See synonyms at sarcastic

Carter:

1. A charioteer. [Obs.] Chaucer.

2. A man who drives a cart; a teamster.

3. (Zoöl.) (a) Any species of Phalangium; -- also called harvestman. (b) A British fish; the whiff.

I'd like to point out that I prefer the 2nd definition. I object to being called a "whiff".