7
7 is a ritualistic practice of Goblins, that involves chanting "7" in unison after an arbitrary prompt or mention of the mythical number. It is theorized that 7 increases social cohesion and helps manifest structure and a feeling of belonging and security among a chat of goblins. 7 is an omnipresent icon of goblinhood and permeates many aspects associated with it.
The origins of this idiosyncratic expression are largely lost in time. There might be a distant relation to the salute emote "o7" but 7 transcends its potential emotive roots.
Technical Explanation
The number seven is notable for being the only single-digit number above zero with two syllables, making it take the longest for Text-to-Speech (TTS) systems to say. This unique characteristic became a source of amusement during Thor's early streaming days. Viewers would often send excessively long TTS messages, aiming to push the system to its limits without causing it to break. Occasionally, the TTS service would fail to process particularly lengthy messages, resulting in the system "eating" the message and leaving only silence. This quickly became a running joke in the community.