Definition of volatile for English Language Learners. : 1  likely to change in a very sudden or extreme way. : 2  having or showing extreme or sudden changes of emotion. : 3  likely to become dangerous or out of control.
expletive (comparative more expletive, superlative most expletive) 1  Serving to fill up, merely for effect, otherwise redundant. 2  Marked by expletives (phrase-fillers).
The exclamation point (!) is a terminal punctuation mark in English and is usually used at the end of a sentence with no extra period. It can turn a simple indicative or declarative sentence into a strong command or reflect an emotional outburst.