Music sites including PropertyOfZack yesterday reported that "several trusted sources" had confirmed the comeback, which was excitedly welcomed by fans.
However, Trohman took to Twitter to deny the claims.
He wrote: "The rumours are still untrue, unreal & totally outta this world! *shreds gnar, does surf's up hand signal*. Seriously, it's not going down. (sic)"
Trohman later retweeted an angry response to his denials from a user: "Finally! I was sick of people liking me. RT @JamieStrike: @trohman It's not a true until Pete [Wentz] says so. Nobody like you, f**k off."
Fall Out Boy announced an indefinite hiatus in November 2009 following the release of Believers Never Die - Greatest Hits. Rumours have circulated since late last year that the four-piece - Patrick Stump, Wentz, Trohman and Andy Hurley - were preparing to record together again.