An idiom or a figure of speech that conceals where you are truly going and what you are really going to do. In all honesty, you are sending the message that you are heading for the toilet to lay waste in. This phrase is derived from a much similar phrase, does a bear crap in the woods?, which is a question that is posed after someone states the obvious.
See Going to see a man about a dog and Going to see a man about a horse for similar phrases.
"I'll be right back. I'm going to see a man about a bear in the woods."
you are saying you are doing pot but you are actually making a general statement about hanging out and having fun. It means you are trying to hang out with your friends and chill.
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)