A typical Tumblr/meme-based reply by somebody exaggerating their apparent amusement towards the post in question. Most often used by the same morons that happily and unashamedly use the term 'bae' in normal conversation.
A phrase used by morons who believe something is funnier than it is except in reality their reaction is that of watching a political debate. Nobody knows who started this trend, but we all wish they're currently burning in the hottest place in hell.
Joe: Say's something retarded Tumblr White Gurl: I'M SCREAMING