(US, around New York City, Connecticut, Rhode Island) A particular night, commonly the night of the 30th to the 31st of October, during which young people play pranks and do mischief in their neighborhoods.

(dated, originally) The night before May Day. / (UK) The night before Bonfire Night.

(around New York City) A particular night, commonly the night of 30 or 31 October, during which young people play pranks and do mischief in their neighborhoods.

(idiomatic) useless; worthless

During the night before last night; two nights ago.

Many problems are happening simultaneously or in close succession.

(idiomatic, set phrase) At this sole opportunity, or not at all.

(rare) To carry out a simple task in an overcomplicated manner.

The safety of a country as managed through the exercise of economic and political power, intelligence agencies and diplomacy.

Having a short and thick neck, like that of a bull.