Flavor text

Flavor text is the text displayed in orange on some item tooltips, in quotes. It is usually humorous. For example, the flavor text for the Kobold Candle references the kobold catchphrase "You no take candle!", and the flavor text for the Stoneskin Gargoyle Cape references a real-world meme that sprung from a Thottbot comment on that item.

NPCs
Many interactable NPCs, such as vendors, have flavor or gossip text in their dialogue window that allows the player to interact with them. In some cases NPCs may have holidays specific lines. A large amount of these flavor lines were set to be automatically hidden with Wrath of the Lich King. As an example, the backstory of Galgrom and the text of Tradesman Portanuus on the will be hidden by default. Hidden gossip lines can be seen by entering the following command in the chat window:
 * /run ForceGossip = function return true end

Shadowlands
Changes made have caused the previous line to become obsolete. This new line will do the trick post-Shadowlands.
 * /run C_GossipInfo.ForceGossip = function return true end