A nap taken any time of the day, whether morning, afternoon, or evening. It is refreshing & reinvigorating. A Niknap will not affect your ability to sleep at night. Everyone should take a daily Niknap.
After a long day at the office, she came home to take a much-needed Niknap.
The act of taking a nap while resting your head on the bounteous bosoms of your girlfriend, wife, chick you met in line at the bank, etc., occasionally awakening to suck on those lovely nipples while murmuring "Mama." Usually post-coital, but need not be.
Trevor: Holy shit! Did you see the tits on that dame?