C.A.R.L.
CARL - Stands for, Cocks Are Really Long. Used mostly by Females to the extent of the size of their partners. A very rarely used term. Also used is C.A.R.B, Meaning Cocks Really Big.

A "Black Carl", or a "White Carl", used for reference with the Black men's penis myth.
My God, the White and Black C.A.R.L. are so different!