They used this phrase because the Brits taxed the colonists for the silliest things and didn't ask for consent by the Colonists. On top of that, the Brits would not allow a colony representative to discuss the matters with them at Parliament. Hope this helps!
<span>"colonist were heavily taxed, though not as bad as today, they had not the concept of the laws passed nor the ability to pass laws desperately needed, therefore they wished to change the system whereby they would not be taxed without representatives.." this is what i got off another legit website.......</span>