A contemptible person or thing.
Something of poor quality.
Any of several species of large Antarctic petrels which feed on blubber and carrion and have an offensive odour, such as the giant fulmar.
One who stinks.
Something difficult (e.g. a given puzzle) or unpleasant (e.g. negative review, nasty letter).
A chemist.
A hot day.
A person who is difficult to work with.