Meaning

• A thing whose name cannot be remembered; thingamajig, doohickey.

• Any device or machine, especially one whose name cannot be recalled. Often either clever or complicated.

  "He bought a neat new gadget for shredding potatoes."

• Any consumer electronics product.

• A sequence of machine code instructions crafted as part of an exploit that attempts to divert execution to a memory location chosen by the attacker.