The term 'friend, in slang' can be expressed in a variety of ways. The most common are 'HOMIE' (5 letters), 'BRO' (3 letters), and 'DAWG' (4 letters). 'HOMIE' is a term of endearment used to refer to a close friend, while 'BRO' is a shortened version of 'BROTHER' and is often used to refer to a male friend. 'DAWG' is another term of endearment used to refer to a close friend, and is often used interchangeably with 'HOMIE' and 'BRO'.