plural of fast mover

(military, slang) fighter jet

(idiomatic) Extremely fast, fast as lightning.

(idiomatic) Extremely quickly.

(chiefly US, set phrase) A period of time characterized by quickly-paced activity, especially involving extravagant or risky conduct, sexual behavior, or other exciting events.

simple past tense and past participle of fast track

Food that is served quickly, often standardized and pre-prepared. / A type of food that is quickly made, but of low nutritional value; junk food.

plural of fast-neutron reactor

(dated) To eat breakfast; to eat the first meal of the day after a night of not eating or to conclude any period of fasting by consuming food.

plural of fast Fourier transform