Sentences with Whachamacallit

I always keep a whachamacallit in my drawer for emergencies.

The mechanic fixed the whachamacallit under the hood, and now my car runs smoothly.

Can you pass me the whachamacallit on the shelf? I need it for my project.

The scientist discovered a new species and named it the whachamacallit beetle.

In the recipe, it called for a pinch of salt and a whachamacallit of spice.

The toy assembly instructions were unclear, so we ended up with a whachamacallit left over.

The detective found a mysterious whachamacallit at the crime scene, but couldn't identify its purpose.

During the conversation, she couldn't remember the whachamacallit for a specific emotion.