The coincidence where a person suddenly forgets everything he has learned in class during a test.
Also, the abnormal amount of stupid mistakes a student makes during an exam.
A cunning mixture between Bastard and Twat, used when someone is bad enough to be both at the same time. Also as it is not technically a swear word, no one should have any objections with you shouting at them!
Someone who needs everything to be "Tactical" equipment or carries "Tactical" wallets, pens, sunglasses, gloves, hankerchiefs, lipbalms, chewing gum, and so on, and won't shut up about it.
"My wallet is kevlar and would stop a bullet and my pen is waterproof to a depth of 200ft"
"God you're afucking tactard"