Many, many gay and fat jokes. Before Chuck realizes firsthand how homosexuals are discriminated against, he's the first to say hateful words about homosexuality; later he changes his tune -- as do the rest of the firefighters. But there's no redeeming the movie's painful Asian stereotypes, which take the form of a Canadian wedding chapel owner (it's obviously Rob Schneider dressed as an East Asian man).
Chuck punches a protesting minister who calls him a "faggot."
Chuck is known as a womanizer; he has five lingerie-clad girlfriends spending the night. He makes twin sisters kiss each other (off screen -- viewers see the firefighters' reactions). A woman discusses how "freaky" she can get in bed. Firefighters' bare buttocks are visible in a fairly long shower scene. Many jokes about all the "hot gay sex" Chuck and Larry are having while they're pretending to be a couple. Chuck receives pornographic material (a blow-up doll, brown paper packages marked "explicit," Trojan XL condoms case, etc.) in the mail. A calendar shows hetero men in homosexual poses.
Homosexual hate words like "faggot" and "fag" are used for the first half of the movie; later, a character explains why it's insensitive to use those words. Other curse words include "ass," "a--hole," "s--t," "bitch," "whore," "dick," "fatboy," etc.
Chuck shows an obviously stoned store employee the marijuana joint that started a fire; Chuck and another character drink wine; partygoers drink.