Resembling or characteristic of a fantad; excessively enthusiastic or fanatical in the manner of a devoted fan.
From 'fantad' + '-ish' (adjective-forming suffix meaning 'like' or 'somewhat'). This creates an adjective describing qualities associated with fantads.
The suffix '-ish' is English's way of saying 'sort of' or 'kind of'—you can attach it to almost anything, which is why speakers instantly understand new words like 'fantaddish' even if they've never heard it before, showing how flexible English grammar really is.
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