"No taxation without representation" is a slogan

Slogan

A slogan is a memorable motto or phrase used in a political, commercial, religious and other context as a repetitive expression of an idea or purpose. The word slogan is derived from slogorn which was an Anglicisation of the Scottish Gaelic sluagh-ghairm . Slogans vary from the written and the...

 originating during the 1750s and 1760s that summarized a primary grievance of the British colonists in the Thirteen Colonies

Thirteen Colonies

The Thirteen Colonies were English and later British colonies established on the Atlantic coast of North America between 1607 and 1733. They declared their independence in the American Revolution and formed the United States of America...

, which was one of the major causes of the American Revolution. In short, many in those colonies

Patriot (American Revolution)

Patriots is a name often used to describe the colonists of the British Thirteen United Colonies who rebelled against British control during the American Revolution. It was their leading figures who, in July 1776, declared the United States of America an independent nation...

 believed the lack of direct representation

Representation (politics)

In politics, representation describes how some individuals stand in for others or a group of others, for a certain time period. Representation usually refers to representative democracies, where elected officials nominally speak for their constituents in the legislature...

 in the distant British Parliament

Parliament of the United Kingdom

The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative body in the United Kingdom, British Crown dependencies and British overseas territories, located in London...

 was an illegal denial of their rights as Englishmen

Rights of Englishmen

The rights of Englishmen are the perceived traditional rights of British subjects. The notion refers to various constitutional documents that were created throughout various stages of English history, such as Magna Carta, the Declaration of Right , and others...

, and therefore laws taxing the colonists (one of the types of laws that affects the majority of individuals directly), and other laws applying only to the colonies, were unconstitutional.