"Dude, Math Class Sucks": The Slur Behind the Phrase

It's commonplace in our society to use the phrase "It sucks" to indicate that something is ineffective, useless, boring, ignorant, or just plain bad.

Why would you want to insult your job, your math class, an activity, or a tv show by stating that it draws air or liquid into an opening by forming a partial vacuum?

How could they even do that?  And if they could, what's the problem?  Why is that especially bad?

It's an expansion of the derogatory term used for people: "He sucks."

Same question: why does drawing air or liquid into your mouth by forming a partial vacuum make you a bad person?

The Urban Dictionary claims that it from comes from jazz musicians, who would blow their horn to make music.  If they were inept, they would suck instead of blow.  Thus, "They suck."

That's bull.

We all know what it really means, but in case you need a reminder, sometimes the phrase is expanded to "cocksucker."

It means that you are a bottom for oral sex.

Why would that form of sex be deemed so reprehensible?

Women do it to hetero men, and of course hetero men find women reprehensible.

When gay men do it, it makes them "like women," and of course hetero men find that even more reprehensible.   How could someone with a penis demean himself like that?

Of course, you're probably not thinking of it in that way.  You're using it as a general expression of distaste, just like we might call someone a "motherf*er" without implying that they actually have sex with their mother.  We're trying to imply a similar level of wrongdoing.

So when you say "Math class sucks," you don't mean that it actually behaves like a gay man; you mean that it is as reprehensible as a gay man who engages in oral sex.

Thus insulting every guy who has ever gone down on you, and insulting yourself, if you have ever gone down on a guy.