A person or thing that performs poorly or is considered substandard, often in a context of entertainment or performance.

खराब या निम्न स्तर के व्यक्ति या चीज।

English Usage: "The comedian was a real wacker, failing to get any laughs during the show."

Hindi Usage: "वो कॉमेडियन सच में एक wacker था, शो के दौरान कोई हंसी नहीं उत्पन्न कर पाया।"