(idiomatic) In suspense; waiting eagerly or anxiously for some resolution.

Adjectival or attributive form of angels dancing on the head of a pin.

(figuratively) The subject of arcane intellectual speculation; used as an example subject of enquiry the pursuit of which is of no value.

Alternative form of one man and his dog

The situation where an event is so well attended, or public transportation so full, that all of the seats in the venue are occupied, leaving only the ground or the floor for other people.

Offered for sale. / During a real estate auction: going to be sold at that auction, i.e. the bid has reached the vendor's reserve.

To focus on getting correct details which are largely irrelevant.

(idiomatic, Britain, colloquial, humorous) Mad; insane.

formerly / simultaneously, at once.

That attaches to something by means of a clip.