Johnny Knoxville says he's not only gonna beat WWE Intercontinental champion Sami Zaynat WrestleMania 38 in Texas ... he's literally going to end his career!!
Knoxville joined Babcock on the TMZ Sports show on FS1 ... where he said he's champing at the bit to settle the score between him and Sami.
"I can't wait to get to Dallas to slap Sami Zayn in his stupid face," Johnny says.
Of course, the feud between Knoxville and Zayn has been going on for months.