Someone with exceptional skills in a certain field.
A type of firefighter highly skilled in wildfire firefighting without external support, using basic tools that are backpacked in and manhandled about.
A fast freight train.
A dose of recreational drugs deliberately laced with poison.
To give (somebody) a dose of recreational drugs deliberately laced with poison.
Displaying talent.
Highly skilled.
A professional sportsman.
Professional.
A prostitute.
A chemical prophylaxis taken after sex to avoid contracting venereal disease.
A person who supports a concept or principle.
An advantage of something, especially when contrasted with its disadvantages (cons).
In favor of.
Professional.