A pro re nata session of sleep. Can last as little as 10 minutes (powernap), to 3-4 hours. Not recommended for the ambitious personality, and usually frowned upon by semper fidelis types. Naps are sometimes instituted in some kindgergarten classes. Excessively long daytime naps may contribute to insomnia.
Howard: "I think i'm gonna take a nap."
Nester: "What a waste of time."
Howard: *Sleeps in bed for 2 hours*
Howard: "That was great!"