Are you over thirty? Are you nerdy, uncool, or simply suburban? You can "front a mad vocabulary" with my slang word of the week. Each week I will post a new word along with its definition and a sample sentence. You will be "talking street" in mere weeks. Give it a try... use your new word in a sentence and post it here. KILL IT, KILLING IT or KILLIN' IT (verb) 1: to do a good job, perform well "The soprano KILLED IT in the opera last night" 2: to succeed generally "My brother was KILLIN' IT at Harvard" KILLER (adjective) fantastic, amazing, great SAMPLE SENTENCE: "I'm going to KILL IT in the 10K next week." Source: Slang Flashcards by Who's There, Inc.