Adjective

(en-adj)

Dreadful; causing alarm and fear.

Formidable, powerful.

* 1883: (Robert Louis Stevenson), (Treasure Island)

and there was even a party of the younger men who pretended to admire him, calling him a "true sea-dog," and "real old salt," and such-like names, and saying there was the sort of man that made England terrible at sea.

Intense; extreme in degree or extent.

* {{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=18 citation , passage=‘Then the father has a great fight with his terrible conscience,’ said Munday with granite seriousness. ‘Should he make a row with the police […]? Or should he say nothing about it and condone brutality for fear of appearing in the newspapers?}}

Unpleasant; disagreeable.

* , chapter=12

, title= The Mirror and the Lamp , passage=To Edward […] he was terrible , nerve-inflaming, poisonously asphyxiating. He sat rocking himself in the late Mr. Churchill's swing chair, smoking and twaddling.}}

Very bad; lousy.

* {{quote-news, year=2012, date=April 26, author=Tasha Robinson, work=The Onion AV Club

, title= Film: Reviews: The Pirates! Band Of Misfits , passage=The openly ridiculous plot has The Pirate Captain (Hugh Grant) scheming to win the Pirate Of The Year competition, even though he’s a terrible pirate, far outclassed by rivals voiced by Jeremy Piven and Salma Hayek.}}

Adjective

(en-adj)

Lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence.

Because it's a big stupid jellyfish!

To the point of stupor.

Neurobiology bores me stupid .

(archaic) Characterized by or in a state of stupor; paralysed.

* 1702 Alexander Pope, Sappho 128:

No sigh to rise, no tear had pow'r to flow, Fix'd in a stupid lethargy of woe.

(archaic) Lacking sensation; inanimate; destitute of consciousness; insensate.

* 1744 George Berkeley, Siris §190:

Were it not for [fire], the whole wou'd be one great stupid inanimate mass.

(slang) Amazing.

That dunk was stupid! His head was above the rim!

(slang) damn, annoying, darn

I fell over the stupid wire.