Jiffy (noun)

1. A very short period of time.
2. A moment.

Origin:

The word jiffy is believed to have originated in the late 19th century and is thought to be an american slang term that refers to a short amount of time, though the exact origin of the word is uncertain.

Examples:

1. I'll be back in a jiffy.
2. I'll finish this task in a jiffy.
3. It will only take a jiffy to fix this problem.
4. I'll be with you in a jiffy.
5. I'll be ready in a jiffy.