A few quests later and you are sent by the Order of the Twin Adder to find the Sylph elder in a quest called Spirited Away.
There is a quest called Wretched Hive of Villainy. The questgiver opens by saying the location (a "hive" of the bandits known as the Redbelly Wasps) wasn't always a "wretched nest of scum and villainy".
There's even a shout out to This Very Wiki! One of the quests is called "Enemy Mine" and it involves someone in the South Shroud asking the Coeurlclaw Poachers and Redbelly Wasps to look out for Garleans.
The quest to unlock Hard Mode for Tam-Tara Deepcroft is called Corpse Groom.
One guildleve quest in Coerthas is called "We Can Dismember It For You Wholesale", a reference to a Philip K. Dick short story titled "We Can Remember It For You Wholesale", which in turn was the basis for the movie Total Recall (1990).
Of course, there's always the quest given in Coerthas called Dead is Dead.
The quest to unlock the Extreme version of the Shiva Primal battle in Patch 2.4 is titled "Drop Dead Shiva".
One vanity pet you can own is a gray cube with legs and wings called the "Demon Brick". It is believed to be a shout-out to World of Warcraft developer Ghostcrawler, who famously expressed his annoyance with theorycrafters by saying they'd use a featureless gray cube for a pet if it gave them a little extra DPS.
One of the attacks used in the final fight for Tam-tara Deepcroft Hard Mode is Red Wedding.
The final boss of Hullbreaker Isle is a Kraken, who uses an attack called At World's End.