What causes this on a coin?

I just came across it, kinda brown red looks glazed and seems weird I just dont know what causes this if it was dipped in glue with dirt.
Thank you community for any information

 

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Looks like dried adhesive on it. You can see where a part of it chipped off around 1-2 o'clock, right after TRUST.

 

Its not an error and appears to be dried glue.

 

Just as you say. Someone had it in something sticky and it got gunk on it over time.

 

Sweet thank you so much for the help. Looked like a glazed donut but learning these things really helps. I appreciate it very much everyone!

 

Looks like a possible "cup holder coin" that was in a cars cup holder and got stuff spilled on it, or it is just PMD, post mint damage. Certainly NAV, no added value IMHO. Might try a long soak and see if the gunk comes off. Just an experiment for fun, otherwise, spend it.

 

The holder cup is a big maybe, especially if you have had a milkshake or ice cream cup as some manufacturers use Diethyl glycol (DEG) as a substitute for the presence of eggs, and it leaves a shine on where ever it dries. Don't eat cheap Ice cream without reading the label. IMO, Jim