Snowballing is a slang term that describes a sexual practice in which one partner ejaculates into the mouth of the other during oral sex, after which that partner transfers the semen back into the mouth of the ejaculator, or into another's mouth, while kissing. Because the term can refer to multiple transfers, it calls on the imagery of a snowball, which gets bigger as it is moved along.
The term first appeared in the Urban Dictionary in the early 2000s. Its earliest origins may stem from the 1970s, according to The Concise New Partridge Dictionary of Slang and Unconventional English, at which time it was used exclusively by gay men. A 2010 survey of gay men found that 20% said they had engaged in snowballing at least once.
Snowballing is also referred to as snowdropping.
