Verb. Any and all actions a person accomplishes during a normal time of sleep, excluding breathing and dreaming. If you should be asleep and someone asks you what you are doing, you can cover watching TV, jerking off, drinking yourself into a stupor, chatting online, or anything at all by simply telling them you are insomniating.
Your "sweet friend" Joseph asked, "Why you look so fatigued? Don't you had a good sleep last night?."
Me, "Screw you and your empathy. Bitch I am holding an Insomnian passport. "