A Member of Parliament is a representative of the voters to a parliament. Members of parliament tend to form parliamentary parties with members of the same political party. The term Member of Parliament is often shortened in the media and in every day use to the initialism "MP".
There are currently 650 MPs in the House of Commons, who were last elected at the 2017 General Election.
"My MP raised my issue in the House of Commons." "I have a Labour MP representing my constituency."