This is an ongoing list of some of the terminology I use on this site that is eSports specific. This definitely is not everything, but like I said, this is ongoing.
Ace: To kill every member of the opposing team. This is a universal term in eSports that applies to Overwatch, CSGO, League of Legends, etc.\
Aggro: AI or player targeting priority. Minion aggro is the targeting priority of minions in lane.
Bait: To draw enemies into a trap by pretending to be at a disadvantage. This can be acting like you lack information you have, pretending to play unintelligently, etc.
Burst: A large amount of damage dealt in a short period of time.
Crowd Control (CC): Status effects that limit champion mobility such as snares, stuns, slows and pulls.
Farm: To kill minions in order to gain experience and gold.
Gank: To flank and attack unsuspecting enemies. Jungler’s gank lanes periodically to assist their laners.
Jungler: The champion whose farms the jungle and ganks lanes.
Scaling: Getting stronger as the game goes on as you increase in experience and gold.
Snowball: To gain an advantage that grows upon itself.
Squishy: Defensively weak due to low health and defenses.
Zoning: A tactic to prevent enemies from gaining experience or gold.