Fart threads are threads on OT that "joke" about farts, usually involving Peter Griffin, these threads are in all caps, the type of writing raging kids on roblox games would use, posters usually resemble Peter Griffin
An example of a "Fart Thread" would be
PETER GRIFFIN NEW RULER ACCEPT OR GET FARTED ON MUHAHAHAHAH
Fart Threads are looked down upon due to their immature and overall unfunny nature, that people with something called "common sense" would despise.
The fad started with fiamingdiner (an alt of someone that no one really knows whose main it is) making an alt named ilovemom11111 (not to be confused with iluvmom2000).