Suck is a versatile English slang term with multiple meanings:
1. Literally means to draw something in by creating a vacuum (like sucking through a straw)
2. Slang meaning "to be very bad" (This movie sucks!)
3. To be unpleasant or annoying (This job sucks)
4. In sports, means to perform poorly (Our team sucks this season)
5. As a noun, means something of poor quality (That's a total suck)
6. In gaming slang, means to be unskilled (You suck at this game)