Where did the expression heres mud in your eye come from?

The expression "here's mud in your eye" is believed to have originated in the late 19th century, possibly as a humorous toast. It may refer to the idea of drinking to excess, where the phrase suggests a playful acknowledgment of the messiness that can come with celebration. Some theories link it to horse racing, where mud splashes onto spectators, symbolizing the unpredictability of life. Overall, it conveys a light-hearted sentiment in toasting or wishing good luck.