Variations of the word: need some coffeing done, coffeed.
Samantha: What were you up to yesterday evening? I called you, like, 50 times at 6 pm?
Aaron: Take a chill pill, Sam. I was just coffeeing and listening to music.
The act of licking bare the dried, frothy remnants of a long black from the inside rim of your cup so as to ingest every last bit of caffeine possible.
Gad, would never have survived the meeting had I not gone coffeelingus on that last cuppa!