also coverup, "means or act of concealing" some event or activity, 1922, from the verbal phrase (1872), from cover (v.) + up (adv.).

from 1906 as a type of baseball hit; from pop (v.) + up (adv.). As an adjective from 1934 (of a children's book, later toasters, etc.).

c. 1400, "keep from view or use, render inaccessible" early 15c., "to lock up, confine," from shut (v.) + up (adv.). The meaning "cause to stop talking" is from 1814 (Jane Austen). The intransitive meaning "cease from speaking" is from 1840, also as a command to be silent, sometimes colloquialized in print as shuddup (1940). Put up or shut up "defend yourself or be silent" is U.S. slang, by 1868.

"interior regions," 1680s, from up- + country (n.). As an adjective from 1810; as an adverb from 1864.

1882, from the verbal phrase; see write (v.) + up (adv.).

"a joining together or coupling," 1945, from the verbal phrase; see link (v.) + up (adv.).

1830 as the name of a children's game (OED describes it as "all-fours" when played for seven "chalks"); with capital initials, as the proprietary name of a brand of carbonated drink, it is attested from 1928.

verbal phrase, by 1826 as "to disgrace through exposure;" see show (v.) + up (adv.). The meaning "to put in an appearance, be (merely) present" is by 1888. The noun sense of "an exposure of something concealed" is by 1830, colloquial.

"adjustments made to an automobile to improve its working," 1911, from verbal phrase tune up "bring to a state of effectiveness," 1718, in reference to musical instruments, from tune (v.) + up (adv.). Attested from 1901 in reference to engines. Meaning "event that serves as practice for a later one" is from 1934, U.S. sports jargon.

"add strength," 1941, from college slang, from beef (n.) in slang sense of "muscle-power" (1851).