To suck on a man's dick until they cum.

Sucking DIIIIIICCCCCCCKKKKKKKKKKK

Giving head, also called head shot it's shooting someone in the head in a video game such as fortnite.

perform oral sex on an another individual

giving oral sex, usually used to describe giving it to a male, but could be either

When a young teenage girl sneaks over to her male friends house, goes to his room, and without his parents knowing, quietly removes his head from the rest of his body with some sharp object and presents it to her conservative parents, who congratulate her with a credit card.

Either to perform fellatio on a male, or cunnilingus on a female.