soft wet earth or any sticky mixture of a solid and a liquid resembling this
abusive or malicious remarks or charges
here's mud in your eye
an informal and humorous drinking toast
sling/throw mud at
to make abusive or malicious remarks about (somebody) or subject them to malicious charges
somebody's name is mud
informal the person concerned is held in disgrace contempt or is very unpopular
[Middle English mudde, prob from Middle Low German mudde]