An announcement.

To pronounce, announce, utter, say, or clearly indicate, as though officially, or with authority, or bearing formality.

A combination of the words declare and decorate.

Declare: short for Declaring my independence. Used as a slang term for smoking Cannabis, due to the fact that the United States Declaration of Independence was drafted on hemp paper. The phrase originated from the International School of Indiana, located in Indianapolis.

Note: declaration can be used as a noun as a slang for cannabis

A broad, and life-changing statement popularized by Marshall Erikson from How I Met Your Mother.

When you set the lock screen on your school computer to chocolate milk but the person who uses the computer in the period after you sets it to regular milk.

When a fad or affectation has outlived its coolness, one can declare a moratorium on it. It's a polite way to express one's rage at seeing something silly continue in perpetuity.