A headfirst fall or jump. / (aviation) A drop in altitude with the nose of the craft angled downwards. / (economics, etc.) A rapid fall, e.g. in price or value.

(intransitive, of aircraft) To dive down in a steep angle. / (intransitive, economy) To perform a rapid fall in price or value.

Firehead tetra (fish).

firehead tetra

firehead tetra

(chiefly uncountable) Insertion of one's finger into one's nostril, especially to remove mucus. / (countable) A piece of mucus extracted from the nose using one's finger.

(law) A canon of construction under which the questionable meaning of a doubtful word can be derived from its association with other words.

(idiomatic) To harm oneself as a result of attempting to harm an adversary.

plural of nosebleed / (informal) The nosebleed seats.

(informal, idiomatic) Despite the addressee's belief that the speaker was unaware of something, the speaker, in fact, was already aware.