Errol Spence Jr. is arguably the lb.-for-lb. BADDEST dude in boxing ... but Shawn Porter ain't scared, telling TMZ Sports he's gonna beat Errol up and take his belt!!
Porter -- the WBC welterweight champion -- joined the guys on the "TMZ Sports" TV show (weeknights on FS1) ... and called out Spence -- the undefeated IBF welterweight champ.
"We can talk about Errol Spence being the boogeyman. I don't mind. We can talk about Errol Spence being the most dangerous man in the division. I don't mind."
"He can have all those titles.