For example: He's been punished to clean the floor but he just quickly skimmed it with a broom, with no actual care to how much cleaner the floor would become, and said he's done.
What did he do? - He _______ed it / he was ______ing it
or: How did he perform this task? - ______ly
or: "Clean the floor but don't just ________ it, make me proud!"
I have a few words in my mind but I don't think they fit what I mean or my style of expression: half-ass, skim, slacking...