When your toe has a fungus and you don't know what it is. Also it could be used as a good or bad connotation based on the sentance. For example for a bad connotation it would be, "bruh stop why are you so shingely". And a good connotation in an example is, "Let's go this is soooo shingely like it's AWESOME!". The word can also describe something abnormally weird. This way of the word shingely is it's most commonly used way.