Silencer is a free Google Chrome extension which allows you to mute spoilers, people, hashtags, terms and phrases on Twitter and Facebook.
Silencer lets you mute any content out of your Twitter stream or Facebook news feed:
– Avoid spoilers from TV shows and sports events.
– Mute co-workers or friends that you may not want to to unfollow.
– Mute tweets about #someconference, since you’re not there or not interested.