1. What do you call that thingamajig? You know - the circle with the line through it.

2. What's this silver thingamajig used for?

3. This new multimedia thingamajig allows you to discover things on your own through the wondrous use of the hypermedia approach to education.

4. What's-his-name and thingamajig replace the bright particular.

5. Daddy what do you call that thingamajig?

6. Thingamajig Something difficult to classify or whose name has been forgotten or is not known.

7. Strapping this odd-looking thingamajig around his chest, it derives its power from the expansion of his chest when he breathes.

8. Best Buy is promoting its Geek Squad, promising shoppers before they buy that complicated electronic thingamajig that its employees will hold their hands through the installation process and beyond.