SJW: For someone acting like an SJW.
Rustled: For when a post rustles you, or for when a poster is clearly rustled.
Worf: For something really funny.
Picard: For a facepalm moment, either by the poster or the subject being featured in the post.
Brony: No clue.
Smuggly: Not sure. For someone acting smug?
Salty: For when someone is acting salty.
Ice Burn: For when someone delivers a devastating comeback.
Dislike: "I don't like this."
Triggered: For when a post triggers you, or a poster is clearly triggered.
Hodjing: For autistic repeated posts on a topic.
Garbage: For a post deemed worthless.
Nationalist/Jew/Communist/Islamic: Pretty much context-sensitive, whatever the person giving it wants it to mean.
Bullshit: For what you consider to be a bullshit post.
Faggotry: For actual gay content or just for posts you consider worthy of ridicule.
Haram: For anything that would seriously rustle Muslims (sexy girls, pork, etc).
Blown: For a post that blows your mind.
Solidarity: More nuanced than "like", can be used to express agreement or support.
Like: "I like this."