What is the meaning of !?

Denoting excitement, surprise, shock or sudden realizations.

  1. Expresses excitement, anger or other emotion.

    Expresses excitement, anger or other emotion.

    Replacing a period at the end of a declarative sentence.

    Following a question mark at the end of an interrogative sentence.

    At the end of an interjection that is set off by dashes or parentheses.

    In parentheses; see (!).

    Used in some comics instead of the period (.), ending all sentences, except those that use question marks, ellipses, etc.

    Used by itself to convey that a character is surprised at something.

    Used to convey that a character has made a sudden realization.

    Placed after a herbarium abbreviation to indicate that the mentioned material held there has been examined directly by the author.

    Used to join a descriptor, such as a trait, with its referent, usually a character or relationship.

    The factorial: the result of a multiplication of all integers from 1 to the given number.

    Indicates a good move.

    A Boolean negation, the not operator, serving to invert the truth value of what follows.

    Formerly used as a separator between hostnames in an e-mail address for the purpose of routing a message (called bang path notation).

    Used as a separator between a user's nickname and ident.

    In glosses, marks a word as imperative.

    used at the end of a salutation line of a letter

    Source: wiktionary.org