Manny Pacquiao has a new fight on his hands ... courtesy of the Village People -- 'cause the original cowboy is calling for a BOYCOTT of Manny's fight over his anti-gay comments.
The man leading the charge is Randy Jones -- who's never seen Manny fight but says, "I hear he's a short stack that likes to punch people and fight guys."
Jones says he was blown away when Manny said gay people were worse than animals -- calling the comments, "the most despicable thing in the world."
So, now he's calling on boxing fans to stick it to Manny (who he calls Paquerio) .