1. Having an impressively thorough vocabulary or knowledge of a language, but feeling the need to illustrate that to all persons with which one comes into contact.
2. Showing sesquipedalianism.
Person 1: "How was your date last night?"
Person 2: "Good, though he was a bit vocabularious."
Person 1: "I find gregarious pedantism unnecessary in the utilization of Socartic didacticism."
Person 2: "I find your vocabularious way of speaking irritating."