To have too muchcaffeine in your system to a point where you can no longer have proper train of thought.
Jim : "I guesstimated that!"
Karl : "what's guesstimation dude?"
Jim : "It's like guessing and estimating.......I don't know im really caffinated right now!"
Karl : "Take 5 Jim!"
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)