Synonyms of 'blotchy'
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A patchy substance or colour exists in some places but not in others, or is thick in some places and thin in others.
Bottle tans can make your legs look a patchy orange colour.
Something that is spotty does not stay the same but is sometimes good and sometimes bad.
His attendance record was spotty.
Thesaurus for blotchy from the Collins English Thesaurus
Something that is blotchy has blotches on it.