To draw into the mouth by creating a partial vacuum with the lips and tongue. The baby began to suck on the pacifier to soothe itself.
To extract or remove something by using suction. The vacuum cleaner is designed to suck up dirt and debris from the carpet.
To be very bad or unpleasant. The weather really sucks today; it's been raining non-stop.
To involve or absorb someone completely. He got sucked into the video game and lost track of time.