junk 1 
(jŭngk)
(jŭngk)n.
1. Discarded material, such as glass, rags, paper, or metal, some of which may be reused in some form.
2. Informal
a. Articles that are worn-out or fit to be discarded: broken furniture and other junk in the attic.
b. Cheap or shoddy material.
c. Something meaningless, fatuous, or unbelievable: nothing but junk in the annual report.
3. Vulgar Slang
a. The genitals.
b. The buttocks.
4. Slang Heroin.
5. Hard salt beef for consumption on board a ship.
tr.v. junked, junk·ing, junks
To discard as useless or sell to be reused as parts; scrap.
adj.
1. Cheap, shoddy, or worthless: junk jewelry.
2. Having a superficial appeal or utility, but lacking substance: "the junk issues that have dominated this year's election" (New Republic).
3. Relating to or similar to junk bonds, especially in having a high risk of default: debt of junk status.
[Middle English jonk, an old cable or rope, perhaps from jonk, rush (plant of the genus Juncus, often used to make cordage), from Old French jonc, from Latin iuncus; see JONQUIL.]