Instead of saying boring as fuck you say boring ass fuck to show that you are so really really really ridiculously bored that you would rather see two or more people ass fuck each other or participate in it than pay attention or do whatever it is that's boring.
(Usually used by ghetto black teens) a phrase used by someone who was just verbally embarrassed by a friend. The phrase indicates that the user is about to verbally trash his target. (must put emphases on capitalized words like "Bring Dat ass Here BOI")