I've got a few:
Egalitarianism: The principle that all people are equal and deserve equal rights and opportunities. Sounds great, right?
Wrong. You see, in Tumblrland, the only equality movement that exists or deserves to be supported is feminism (which advocates women's rights and seeks to make them socially, politically, and economically equal to men). Many Tumblr feminists desire to retain a monopoly on the equality movement and so demonize egalitarianism, claiming that it doesn't care about the oppressed and that everyone should just be feminists instead. Yeah, I can't really explain it, either.
Identity as a choice: Probably the biggest victory for the LGBT movement was convincing the public that gay people really are "born this way" and don't deserve to be mistreated for something they can't control any more than they can control the color of their skin. However, as of late, Tumblrinas seem to like the idea that you
can choose your gender/sexual identity. Probably the biggest example of this are the tucutes/transtrenders, who believe that you don't need body dysphoria to be trans and that you can pick and choose what identity and pronouns you want. On the sexuality side, some Tumblrites advocate
political lesbianism (or choosing to be a lesbian because men are icky and gross) and many posts are made where the OP wonders why girls don't just be with girls instead of boys. When confronted about this, many of them will say that they're just advocating for people to "explore their identities" (and you're scum if you disagree) but rarely confront the actual issue of one's sexual/gender identity being a choice.
Male/white tears: A flippant and derogatory response to, you guessed it, someone who is white and/or male. This is usually used when someone is called out for being an asshole regarding a "privileged" group. For example...
Tumblrina: Fuck white people, they all deserve to get rounded up and shot. Then the world would actually be a good place!
Person: Hey, that's pretty offensive. I'm white and I've never hurt anybody.
Tumblrina: Go cry some more white tears to someone who gives a shit.
Oppression Olympics: Not used by Tumblrinas themselves but by the people discussing them, the Oppression Olympics refers to a simple concept: When two or more people compete with one another to see who is the most oppressed or disadvantaged. For example: "So you're a black lesbian? Wow, I would kill to be in your position. I'm half Native American/half Indian and I lost both of my legs in a car accident!" The main event of the Oppression Olympics is mental gymnastics, or jumping through hoops to justify your behavior and/or blame anyone but yourself.
Religion: SJWs have a very...
unusual view of religion. The
vast majority of SJWs are atheist or agnostic, and many look upon religion with scorn, claiming that it is the root of all evil and that humanity would be better off without it. However, "religion" usually only means "Christianity" and occasionally "Judaism;" religions such as Islam, Hinduism, and Buddhism are treated with the utmost respect and anyone who criticizes them is labeled a bigot. The reason for this is simple; Christianity (and to a lesser extend Judaism) is the dominant religion in the Western world (where 99.2% of SJWs are from) and religions such as Islam are seen as exotic and, most importantly, oppressed due to how they tend to be racialized (this is most evident with Islam, as post-9/11 panic has heavily tarnished its reputation within the Western world and Middle Eastern people are often judged/discriminated against). In reality, to SJWs, religion is much more a racial issue than a spiritual one (as to them, Christians are all white and non-Christians are all POC), despite the fact that only a small handful of religions (and none of the major ones) declare that only certain races may follow them.