Ducky (adjective)

1. Endearing or affectionate.
2. Fortunate or lucky.

Origin:

The word "ducky" is of uncertain origin, it could be a variant of "dear" or "lucky".

Examples:

1. She gave him a ducky smile.
2. He had a ducky way of making her laugh.
3. I'm feeling ducky today.
4. It was a ducky coincidence that they ran into each other.
5. The weather was ducky for the outdoor concert.