(computing) The year 2038, in which certain date-related bugs in computer software are expected to manifest themselves.

(slang) An exclamation of joy, excitement or triumph.

(US, nonstandard, rare) Yourselves.

(US, slang) To behave in a wild and carefree manner, so as to use up excess energy or exuberance.

Elongated form of yay.

(computing, often humorous) A bug like the millennium bug, that arises when a 4‐digit year system — from "0000" to "9999" — fails to display, store or calculate the year 10,000 or any later year.

(nonstandard, rare) Yourselves.

(Australian rules football) A conventional expression meant to distract or wish bad luck to an opponent who is taking a kick for goal.

(rare, chiefly Asia) A tablet containing a mix of methamphetamine and caffeine, popular among drug users in Thailand.