So here's a guide on how to use the word "suck" in a university context:
1. Sucks (verb) : Used to say that something is very bad.
e.g . My lecturer sucks.
2. Sucker (noun) : Used to refer in a general way to person or thing, especially for emphasis.
e.g. I wish I could just set that sucker on fire.
3. Suck up (verb) : To try to please somebody in authority by praising them too much in order to gain some advantage for yourself.
e.g. In order to get good grades, Saiful sucks up to the sucky lecturer.
4. Suck up (noun) : A person who sucks up people in authority.
e.g. Saiful is such a suck up.
5. Suck it up (verb) : To accept something bad and deal with it well.
e.g. Those who couldn't suck up to their sucky lecturer, would just have to suck it up.
6. Suck somebody in (phrasal verb) : To involve somebody in an activity or a situation, especially one they do not want to be involved in.
e.g. Deera sucked her classmates in her plan to skip the sucky lecturer's class.
7. Sucker2 (noun) : A person who is easily tricked or persuaded to do something.
e.g. Deera's classmates are all suckers.
8. Suck this (verb) : To express anger or to be deliberately rude to someone by gesturing to your private parts (*apply to males only).
e.g. During the whole time the sucky lecturer was babbling and nagging, the boys were secretly wishing they could say, "Suck this!" to the lecturer without getting into disciplinary problem.
** Readers may add on, or correct writer. 'Coz the writer is still a TESL undergrad who might get sued in court for misconduct in teaching ethics in the future.