"Aye, my sentiments exactly! Better than sitting on the roof like a stick in the mud." Thor was referring to Reaper as the man was at times downright depressing. The Thunderer noticed Carol seemed to have a plan, pacing herself and he realized that he could very well lose if he didn't pace himself as well. He wasn't going for quantity, he simply planned to drink until he passed out.
Eating after every other drink seemed to work well enough for the Asgardian and he couldn't tell if the alcohol was hitting her yet. Carol was really difficult for Thor to read, a myself most of the time. Whether gods of mortals, women were always difficult to understand. Being toasted made it a hundred times harder.