noun
very fast; very early
Slang term used to emphasize extreme speed or earliness, often in casual conversation among younger speakers.
彼の車はチョッパヤで、あっという間に見えなくなった。
His car was super fast and disappeared in no time.
今日はチョッパヤで起きて、始発に乗った。
I woke up super early today and caught the first train.
Likely a contraction of 超 (ちょう, 'super') and 速い/早い (はやい, 'fast/early'), with emphatic gemination and slangy sound change. The exact derivation is uncertain.