Gerald Huston -- the man who was allegedly roughed up by Papoose during a prank-gone-wrong last month -- tells TMZ Sports he's now considering filing a lawsuit against the rapper and his girlfriend, Claressa Shields .

The comedian told us this week that just after Shields brought the incident to light on social media -- he's been in talks with attorneys to see if he has a case.

Huston tells us the story's been twisted so much, he thinks he might have a defamation claim ... in addition to a potential assault one.

The content creator -- who's gained fame for stunts like purposely calling celebs wrong names -- said the incident happened in Las Vegas way back in early September ... just after the Canelo Alvarez vs. Terence Crawford fight. Getty Composite

Huston says S

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