The question mark ping is SUPPOSED to be used to signal that an enemy is MIA, which is shorthand for this term.
What is Missing in Action?
Maven of the Strings
Who is Sona?
Upon encountering this type of champion, Morgana will ask "Did someone send you here as a joke?" before quickly adding "Did Kayle send you?!"
What is a Yordle?
Originally, this champion was just a man seeking vengeance for his fallen family. After his lore change, he became a Darkin, and twice the man he used to be.
Who is Varus?
Removed in Patch 5.22, this consumable starting item was a godsend for champions like Ahri and Syndra. Now only its red counterpart is available for purchase.
What are Mana Potions/Blue Pots?
A manatee lords over the URF gamemode, which is short for this
What is Ultra Rapid Fire?
The Boy who Shattered Time
Who is Ekko?
Upon killing this champion, Rakan will declare "Hello world! I am single now!!!"
Who is Xayah?
Originally titled "The Cursed Troll", this putrid brawler was a pillar of rot and decay. After a massive character overhaul, his curse was removed and he was made a member of the Freljord.
Who is Trundle?
Removed in Patch 10.23, this item passively charged with movement and basic attacks to 120 stacks before an auto attack triggers bonus magic damage that will arc to up to seven enemy targets. Can now only be found in Teamfight Tactics.
What is Statikk Shiv?
This gamemode, also known as ARAM, started out as an esports game-fixing scandal.
What is All Random All Mid?
The Weapon of the Faithful
Who is Aphelios?
Upon attaching to this champion, Yuumi will sometimes ask "After this, will you play the piano for me while I nap?"
Who is Jhin?
This champion used to be a knight from an alien world, and the only one of his kind on Runeterra, but the revamp of Mount Targon's lore not only made him Demacian, but also the mountain's truly truly outrageous Aspect of Protection
Who is Taric?
Removed in patch 10.23, this item's unique passive, Eternity, restored mana equal to 15% of damage taken, and health up to 20% of mana spent. Was a component of Abyssal Mask and Rod of Ages.
What is Catalyst/Catalyst of Aeons
North American e-sports team TSM, or this.
What is Team Solo Mid?
The Heart of the Tempest
Who is Kennen?
Kindred will give threatening remarks to enemy champions who kill their jungle marks. This assassin is the only champion who will respond in kind.
Who is Kayn?
In 2013, Riot games teased Ao Shin, a draconic champion who didn't see the rift until 2016. By that time he was a completely different champion under this name (at least he got to keep the initials).
Who is Aurelion Sol?
Removed in Patch 9.23 this item, named after Youtuber and former Vanoss Crew member, had the ability to deactivate all nearby turrets for 3 seconds. It can still be found in the inventory of turrets.
What is the Ohmwrecker?
Pro players always have to keep up with the current META, or this term:
What is Most Effective Tactic Available?
Will of the Blades
Who is Irelia? (Old title)
The trauma suffered by champions like Annie, Miss Fortune, Lux, Yasuo and Vayne can all trigger voice lines for this demonic champion.
Who is Fiddlesticks?
With the release of Xayah and Rakan came the Vastaya, a race of characters that hold both humanoid and animal-like features. Several pre-existing champions were reclassified as Vastaya, including this vixen, whose entire lore had to be rewritten due to her not originally being humanoid to begin with.
Who is Ahri
Removed in patch 5.22, this item was Kira's go-to for taking Janna top lane. Now, it's only found in Teamfight Tactics, and when placed on an ally unit, it will knock up and disable a random enemy unit for 5 seconds at the beginning of combat rounds.
What is Zephyr?