1) An un-namable gadget of some sort, possibly highly technical.
2) Another meaning for father or dad.

For when you use thingamajig too much, used to refer to an object you can't remember name for.

"Doodad" can be used as a noun, a verb, or an adjective.

adj. You add "-ish" to the end of this word to state an opinion if you're not sure if you like this or not and don't want to insult someone.
n. You can use it for it's common, bland meaning as a nameless object, but you can also call someone a doodad to describe them as call or as uncool.
v. You can use doodad as a verb to describe that you are doing something nameless and/or that you don't want to explain.

A Father of Indian Decent..