"!"
A punctuation mark (!) used after an exclamation; SYN. exclamation point.
Punctuation mark (!) used to indicate emphasis or strong emotion (“That’s terrible!”). It is appropriate after interjections (“Rats!”), emphatic greetings (“Yo!”), and orders (“Shut up!”), as well as those sentences beginning How or What that are not questions (“How embarrassing!”, “What a surprise!”).