She is sucking a lemon.

Working in a call center can be soul-sucking.

Sucking lice are small insects that infest the hair and feathers of animals.

The sucking louse is a parasitic insect that feeds on the blood of mammals.

He was caught sucking off his friend.

He is sucking out the venom from the snake bite.

The sucking urges were overwhelming.

He is sucking ass to get a promotion.

He is sucking arse to get a promotion.

She enjoys sucking cock.