When you have to take a dump so bad you can feel the turd start to peep out of your ass. Derived from the ground hog peeping out of the ground to see his shadow.
This is a slang word used by people in Asia to describe people who are very smart or especially good at something. It comes from the chinese word 學 and god.
To be screwed (literally or figuratively) or to (literally or figuratively) screw someone or something, in a very guttural or hog like way. The "root" typically being phallic in nature
"Feed my girl red drinks all night then she let me hogroot her" or "I'm too busy to talk, I'm getting hogrooted at work right now" or "Holy shitthe Bears took a hogrooting from the Seahawks yesterday"