Aljamain Sterling Thinks Dillashaw's '100%' Doping, Calls Him 'Pill.J DillaRoid'

Aljamain Sterling wholeheartedly believes TJ Dillashaw is juicing, telling TMZ Sports he's "100%" confident the former champ is cheating!!

"I'm excited, man. I can't wait to be standing across the cage and hear Bruce Buffer just go, 'two-time UFC former bantamweight champion Pill.J DillaRoid,' and I'm just gonna be like 'Yeah I'm gonna f**k this guy up!'"

The 33-year-old bantamweight champion is fighting the #2 ranked fighter at UFC 280 in Abu Dhabi on October 22.

You may remember ... TJ was suspended for 2 years for using EPO, a banned substance, during his title fight with Henry Cejudo. TJ admitted to what he did, apologized, and vowed to never again cheat.

But, Aljo ain't buyin' it.

"I think this is a legacy fight for myself to beat a guy like this who's been cheating for years and beating a lot of people for years. I think it does a huge boost to my stock and just go out there and have a good performance. The rest will take care of itself."

We asked Sterling ... you really think TJ's still doping?

"100% man! That guy knows the ins and outs of that whole thing," Aljamain said.

There's much more ... we also talked to Aljamain about the fight, and how he sees himself getting the win.