What is a blowjob?

A blowjob is a term used to decribe oral sex performed on the penis. Although the technique usually involves sucking, rather than blowing, the act of giving fellatio (or, more precisely, fellating to the point of orgasm) is commonly referred to as giving a blowjob. It is usually meant a to be used as foreplay, it may also lead to ejaculation and orgasming.

Fellatio – as well as cunnilingus – can be referred to as 'giving head'.