an unfortunate turn of events. A situation that starts out positive and comes crashing down in flames. Or when one person's chances for success are destroyed by another person's actions, often unintentially.
I was on my way to the ball game, when I got a flat tire. That took me an hour to fix and by the time I got home, my roommates clutchbombed me by drinking all my beer.
My plane ticket was sitting on the counter, but my mom thought it was clutter and threw it in the trash, what a clutchbomb!
He was waiting for the girl from the other night to call him back, but his brother found his phone sitting out, answered it and told her she was fat. It was the ultimate clutchbomb!