Thinking, acting, or speaking inappropriately, as in "performing a sketchlow." Someone who, without notice, disappears into the night like a hawk into the forest, leaving you with only the whispers of the wind. One who provides the comfort level of an undersized shoe. Potentially a shitty co-worker. THAT guy.
He pulled a sketchlow when he insulted my overweight mother by calling her a fat whore.
Remember that time I sketchlowed my way into your girlfriend?
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi