command to a horse to go, 1909, probably an extended form of earlier giddap (1867), itself probably from get up. Compare gee.
The terms used to start horses in harness and to urge them to a better appreciation of the value of time comprise vulgar corruptions of ordinary speech and peculiar inarticulate sounds. Throughout England and the United States drivers start their horses by picking up the reins, drawing them gently against the animals' mouths, and exclaiming go 'long and get up; the latter appears in the forms get ap (a as in hat), giddap, and gee-hup or gee-up. [H. Carrington Bolton, "Talking to Domestic Animals," in The American Anthropologist, March 1897]
also makeup, "manner in which something is put together," 1821, from the verbal phrase (see make (v.) + up (adv.)). To make up "build, collect into one form by bringing together" is from late 14c., also "prepare." It is attested from late 15c. as "supply as an equivalent," from 1660s as "end a quarrel, reconcile, settle differences, become friends again," by 1825 as "to fabricate artfully" (a story, etc.).
In reference to an actor, "prepare for impersonating a role" (including dress and the painting of the face), by 1808. Hence the noun sense of "appearance of the face and dress" (1858) and the sense of "cosmetics," attested by 1886, originally of actors.
1837, "act of bringing a horse or vehicle to a sudden stop," from the verbal phrase; see pull (v.) + up (adv.). To pull up is attested by early 14c. as "lift (someone or something)," late 14c. as "uproot." By 1887 as "a place for pulling up a vehicle." The noun, as a type of horizontal bar physical exercise involving pulling up the body by means of the arms, is attested by 1891.
The sense of "check a course of action" is from 1808, figurative of the lifting of the reins in horse-riding; pull (v.) in the sense of "check or hold back one's horse to keep it from winning" is by 1800.