Is it okay to end a sentence with the word at such as Where is Jimmy at?

The phrase "Where is Jimmy at?" is considered grammatically incorrect in standard English.

Why it's incorrect:

* Preposition at the end: The preposition "at" is placed at the end of the sentence, which is generally considered grammatically incorrect in formal writing.

* Redundancy: The word "at" is unnecessary. The verb "is" already implies location.

Correct alternatives:

* Where is Jimmy? (This is the most concise and grammatically correct option.)

* Where is Jimmy located?

* Where can I find Jimmy?

Informal usage:

While considered grammatically incorrect, "Where is Jimmy at?" is commonly used in informal speech and casual conversation. It's more accepted in spoken language, but it's best to avoid it in formal writing or professional settings.