jack-tar

a man who serves as a sailor ;

jack bean

annual semi-erect bushy plant of tropical South America bearing long pods with white seeds grown especially for forage ;

jack benny

United States comedian known for his timeing and delivery and self-effacing humor (1894-1974) ;

jack crevalle

fish of western Atlantic and Gulf of Mexico ;

jack dempsey

United States prizefighter who was world heavyweight champion (1895-1983) ;

jack frost

a personification of frost or winter weather ;

jack kennedy

35th President of the United States; established the Peace Corps; assassinated in Dallas (1917-1963) ;

jack kerouac

United States writer who was a leading figure of the beat generation (1922-1969) ;

jack ladder

(nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps ;

jack lemmon

United States film actor (1925-2001) ;

jack london

United States writer of novels based on experiences in the Klondike gold rush (1876-1916) ;

jack mackerel

a California food fish ;

jack nicklaus

United States golfer considered by many to be the greatest golfer of all time (born in 1940) ;

jack oak

small to medium deciduous oak of east central North America; leaves have sharply pointed lobes ; a common scrubby deciduous tree of central and southeastern United States having dark bark and broad three-lobed (club-shaped) leaves; tends to form dense thickets ;

jack of all trades

a man skilled in various odd jobs and other small tasks ; a person able to do a variety of different jobs acceptably well ;

jack pine

slender medium-sized two-needled pine of eastern North America; with yellow-green needles and scaly grey to red-brown fissured bark ;

jack plane

a carpenter's plane for rough surfacing ;

jack roosevelt robinson

United States baseball player; first Black to play in the major leagues (1919-1972) ;

jack salmon

pike-like freshwater perches ;

jack the ripper

an unidentified English murderer in the 19th century ;

jack william nicklaus

United States golfer considered by many to be the greatest golfer of all time (born in 1940) ;

jackal

Old World nocturnal canine mammal closely related to the dog; smaller than a wolf; sometimes hunts in a pack but usually singly or as a member of a pair ;

jackanapes

someone who is unimportant but cheeky and presumptuous ;

jackass

male donkey ; a man who is a stupid incompetent fool ;

jackass bat

a large bat of the southwestern United States having spots and enormous ears ;

jackass penguin

small penguin of South America and southern Africa with a braying call ;

jackboot

(19th century) a man's high tasseled boot ;

jackdaw

common black-and-grey Eurasian bird noted for thievery ;

jacket

a short coat ; an outer wrapping or casing; "phonograph records were sold in cardboard jackets" ; the tough metal shell casing for certain kinds of ammunition ; (dentistry) an artificial crown fitted over a broken or decayed tooth ; the outer skin of a potato ;

jacket crown

(dentistry) an artificial crown fitted over a broken or decayed tooth ;

jacket potato

a baked potato served with the jacket on ;

jackfruit

immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted ; East Indian tree cultivated for its immense edible fruit and seeds ;

jackfruit tree

East Indian tree cultivated for its immense edible fruit and seeds ;

jackhammer

a hammer driven by compressed air ;

jackie robinson

United States baseball player; first Black to play in the major leagues (1919-1972) ;

jacking off

slang for masturbation ;

jackknife

a dive in which the diver bends to touch the ankles before straightening out ; a large knife with one or more folding blades ;

jackknife-fish

black-and-white drumfish with an erect elongated dorsal fin ;

jackknife clam

marine clam having a long narrow curved thin shell ;

jacklight

a light used as a lure in hunting or fishing at night ;