On Tilt. Adjective. Upset or frustrated to an extent that causes poor decision- making during game play; steaming. ADDITIONAL INFORMATION: It is common for a. This Slang page is designed to explain what the meaning of on tilt is. The slang word / phrase / acronym on tilt means . Online Slang Dictionary. A list of slang. I've seen this expression in Dota 2 and League of Legends and I've Tilt originated from Poker and it's usually a state of emotional frustration.