Spreading the word, or 'raising awareness' of an issue without actually doing anything useful (like, say, donating money). Popularly employed on Tumblr by image-conscious bloggers who want to look like they care deeply about a cause or issue, while they try to avoid investing any time, money or effort into said cause.
A Tumblrslacktivist reads a blog post from another Tumblr user who doesn't have enough money to pay rent and is shamelessly groveling for money on the internet.
Tumblr blogger: "Reblogging this is as good as giving money, right? I'll just tag it 'signal boost' so everyone knows how much I care about raising awareness and helping others."
A derogatory label used by a transgendered person to attack, insult or degrade another transgendered person. The implication being that the other person isn't a REAL transgender because they don't want to get surgery or hormone therapy to change their gender.
Basically it's members of a discriminated-against minority attempting to discriminate against, and one up each other.
Transgendered blowhard: "I can't believe she has the nerve to say that she feels uncomfortable in her body and wishes she was a man! She won't even have surgery done to give herself a fake dick! She's obviously just in it to look cool. What a transtrender."
Normal person: "Dude, why would anyone think it's trendy or desirable to be part of a misunderstood and ostracized gender minority? Maybe she just doesn't feel the need to take things as far as you have? Why can't you respect her choices?"
Transgendered blowhard: "Shut up, I'm trans, you're not, and I speak for my entire community!"