Stick one’s neck out

What is Stick one’s neck out?

Stick one’s neck out definition and meaning on Dictionary terms:
noun

the part of the body of an animal or human being that connects the head and the trunk.
the part of a garment encircling, partly covering, or closest to the neck; neckline.
the length of the neck of a horse or other animal as a measure in racing.
the slender part near the top of a bottle, vase, or similar object.
any narrow, connecting, or projecting part suggesting the neck of an animal.
a narrow strip of land, as an isthmus or a cape.
a strait.
the longer and more slender part of a violin or similar stringed instrument, extending from the body to the head.
Building Trades, Machinery. the part on a shank of a bolt next to the head, especially when it has a special form.
Anatomy. a narrowed part of a bone, organ, or the like.
Dentistry. the slightly narrowed region of a tooth between the crown and the root.
Printing. beard(def 5).
Architecture. a cylindrical continuation of the shaft of a column above the lower astragal of the capital, as in the Roman Doric and Tuscan orders.
Also called volcanic neck. Geology. the solidified lava or igneous rock filling a conduit leading either to a vent of an extinct volcano or to a laccolith.