Something that looks, sounds, or feels like it's not real or genuine; fake-like or artificial.
From 'fake' plus the informal adjective-forming suffix '-y' (as in 'shaky' or 'sneaky'). This is a common casual English pattern for creating adjectives.
The suffix '-y' is one of English's most productive and ancient patterns—it appears in Old English words like 'þicce' (thick), showing we've been making adjectives this way for over 1,200 years.
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