PERIOD, FULL MARK in sign language
The English terms full stop, period or full point is a punctuation mark, indicating a complete sentence. Or, you might use it with a dash of anger to say you will not continue to discuss a subject. (˘^˘)
Here is how to sign the punctuation mark in ASL.
Meaning: A punctuation mark (.) used at the end of a sentence or an abbreviation.
Pronunciation (sign description): Dominant "20" hand (handshape) with the palm facing outward (orientation) slightly moves forward (movement) in space (location).
A big punctuation mark with emphasis which means more than just a mark. E.g. "I'm not discussing further with you, PERIOD" or "I've made up my mind that I'm not going to the university, PERIOD". (˘^˘)
This colloquial word PERIOD in ASL suggests that the person has made his decision firmly and does not wish to discuss further.
End of story. Full stop! (˘^˘)