How you doing?
How (are) you doing?
a standard greeting inquiry. (The entry without are is informal and usually pronounced "How ya doin'?") Jane: How are you doing? Mary: I'm okay. What about you? Jane: Likewise. Sally: Sue, this is my little brother, Bill. Sue: How are you, Bill? Bill: Okay. How you doing?
See also: how
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.