adjective
Having an extreme dedication to a certain activity.
So hard as to require extreme dedication to complete.
(colloquial) Particularly intense; thrillingly dangerous or erratic; desirably violent in appearance; pleasing or "cool" due to intensity or danger.
Resistant to change.
Obscene or explicit.
(pornography) Depicting penetration and abnormal sexual activity.
(music) Faster or more intense than the regular style.
noun
Broken bricks, stone and/or other aggregate used as foundations, especially in road and path laying.
Several music genres, including:
adverb
(colloquial) In a hardcore manner; intensely or extremely.