(temporal location, idiomatic) Late into the night or early morning; when people ought to be sleeping.

(idiomatic) Watching alertly or attentively. / (idiomatic) Having prominent eyes. / (idiomatic, with for) Gazing at devotedly.

(set phrase, duration) Always; constantly; for the complete duration. / (set phrase, frequency) Very often; frequently.

(idiomatic) Especially; more than other people

(euphemistic, slang) fuck all.

The four legs of a quadruped. / The four limbs of a primate. / A card game similar to whist. / A certain game of dominos.

Written in all caps, with all letters capitalized.

(law) All without exception.

(informal) Extreme or intense in degree.

(informal) To an intense degree.