1. past tense and past participle of 'dup': to open (a door or gate)
Usage: archaic; chiefly British dialect
2. past tense and past participle of 'dup': to duplicate or copy
Usage: informal; technical

Examples

• He dupped the door and stepped outside.
• The file was dupped to create a backup.
• She dupped the key in the lock.
• The technician dupped the hard drive for safety.
• They dupped the gate to let the visitors in.