A dark colored wood that can also be used as a reference to black people. Originates from an African American bookstore in a southern states mall called Mahogany Books and Gifts. Due to the similarities in the skin tone of African Americans and mahogany wood, the expresion mahogany was derived. May also denote an excessive level of black ethnicity.
This may also be shortened to mahog or mohog.
Both expressions are encouraged to be use plurally such as mahoganies or simply, mohogs.
As an additional note, this is an excellent way for caucasions to speak directly about black people in the presence of said individuals without causing a confrontation.