Eurocrat is a neologism used by press with rather vague meaning used by mainly eurosceptic

Euroscepticism

Euroscepticism is a general term used to describe criticism of the European Union , and opposition to the process of European integration, existing throughout the political spectrum. Traditionally, the main source of euroscepticism has been the notion that integration weakens the nation state...

 press to refer either to the Civil Servants of the European Union or its political representation as a Member of the European Commission or European Parliament.

EU Civil Servants

Originally the term was coined by Richard Mayne, a journalist and personal assistant to the first Commission president, Walter Hallstein

Walter Hallstein

Walter Hallstein was a German politician and professor.He was one of the key figures of European integration after World War II, becoming the first President of the Commission of the European Economic Community, serving from 1958 to 1967. He famously defined his position as "a kind of Prime...

).; to refer to EU Civil Servant

European Civil Service

The European Civil Service is the civil service serving the institutions of the European Union, of which the largest employer is the European Commission, the executive branch of the European Union...

.

European Commission

Later the term has expanded also to the elected bodies like the European Commission

European Commission

The European Commission is the executive body of the European Union. The body is responsible for proposing legislation, implementing decisions, upholding the Union's treaties and the general day-to-day running of the Union....

and its members.

EU Stakeholder

Today its is used just for anything and anybody having whatever relation with decision processes at EU level; namely Member of the European Parliament, European Union Council. This usage is made namely by eurosceptic press together with "Brussels" .