The term REPORT CARD BUMMER can be broken down into three words: REPORT, CARD, and BUMMER. The first word, REPORT, is a 3 letter word that can be abbreviated as DEE. A REPORT is a document that contains information about a particular topic or issue. The second word, CARD, is a 4 letter word that can be abbreviated as KAED. A CARD is a thin, flat piece of material that typically contains information such as a person's name, address, or other details. The third word, BUMMER, is a 6 letter word that can be abbreviated as UMMERB. A BUMMER is an unpleasant or disappointing experience. Therefore, the term REPORT CARD BUMMER can be summarized as an unpleasant or disappointing experience related to a REPORT or CARD.