Dummy

n. trial attempt; rehearsal. dump n. 1 place or heap for depositing rubbish. 2 colloq. unpleasant or dreary place. 3 temporary store of ammunition etc. u 1 put down firmly or clumsily. 2 deposit as rubbish. 3 colloq. abandon or get rid of. 4 sell (excess goods) to a foreign market at a low price. 5 copy (the contents of a computer memory etc.) as a diagnostic aid or for security. -7 dump on esp. US criticize or abuse; get the better of. [origin uncertain]