Someone who uses rhetorical terms (such as synecdoche) frequently, pompously, and/or incorrectly.
Betty: Do you really love me?!
Tom: Is that a rhetorical question?
Adam: Dude, he says that every time. What a synecdouche.
A play on the word synecdoche, a term denoting a part of something is used to refer to the whole thing.
Mark is such a synecdouche.