What is Full stop ?
Full stop is (noun) 1. a punctuation mark like a small dot, showing the end of a sentence or an abbreviation When reading, you can take a breath when you come to a full stop. (NOTE: The US term is period.) 2. meaning ‘there’s nothing more to say’ She doesn’t like German food, full stop. (NOTE: The US term is period.) 3. a complete stop The car skidded across the road and came to a full stop when it hit a wall.
source: Easier English, Student Dictionary Upper Intermediate Level