Black Professional. 

A black man or woman who is well educated and/or successful in his or her chosen profession. Much more common nowadays than stereotypes of black people allow.

Michelle Obama is a black professional.

Black Professional. by Athlone April 18, 2012

Professional Cock Block 

A secret way of blocking anyone from dating a certain individual.
Professional Cock Block artists have their own secret way of doing things.

They usually do it to be protective of someone they care about.

Person 1: He is such a Professional Cock Block.

Person 2: Well maybe it wasn't meant to be.

Person 1: Be cautious around those Professional Cock Blocks, they know how to trick you.

Professional Cock Block by DontFeedTheTrolls April 16, 2013

Stand back, I am a professional 

Something someone says to reassure themselves that they can do the job. Most commonly used when the person has no idea what they are doing.

Stand back, I am a professional miss. *She steps away from the outlet*

Stand back, I am a professional by theHPninja May 16, 2010