David Cameron

(noun)

1. Some random teacher that loves math, has tasteful humor, has a great teaching style, and constantly reminds his students to tell him if he is being an idiot that very day.

2. The less formal way of addressing Mr. Cameron.

Present Perfect, First Person Singular: He has reviewed the work and can say with certainty that DAVID CAMERON is not an idiot.
Present Simple, First Person Subjective: "That's no idiot! That's a David Cameron!"