(idiomatic) More complex or confusing than one can understand; beyond one’s comprehension. / (idiomatic) More than one can handle; too much (especially in over one's head).

(idiomatic) To feel energetic or frisky; to behave in a vigorous or bold manner. / (idiomatic) To feel important; to be empowered.

(idiomatic, chiefly in the negative) To identify, specify, name or pick out.

Known but not quite remembered.

(idiomatic) To refrain from talking about something.

(American football) In the AFL, a warning given with one minute to go before the end of a half, after which special rules apply, eg, stoppage of the game clock after very first down.

(card games) In card playing, to accidentally reveal one's cards or hand. / (figuratively) To inadvertently reveal any secret, particularly a secret that puts one at an advantage or disadvantage.

(idiomatic) A recording artist known for only one hit song, especially after failing at subsequent attempts at success.

To behave in a manner appropriate to one's age. / (imperative, originally US) To behave in a mature manner; to avoid being childish.

(bingo) eight