That crazy wild mop on top of your head after crazy wild orgasmic sex filled with sweat and other debris that fell from the ceiling and walls as you woke your neighbors screaming and moaning, pounding against the wall.
This can be intensified with orgies.
John: Wow! look at your hair man! It is a mess!
Adam: Yea, well I just got done having wild crazy sex.
John: Thats what a call a "Sex Mop!"