To have sex with someone. (Vulgar slang)
"The song was about two people who finally get it on after years of tension."
Let's get it on.
— Marvin Gaye, 'Let's Get It On' (1973)
To have sex, or (less commonly) to start a fight or competitive activity.
To have sex with someone (very informal).
2 meanings, ordered from most common to least. Color-coded by CEFR level.
To have sex with someone. (Vulgar slang)
"The song was about two people who finally get it on after years of tension."
Let's get it on.
— Marvin Gaye, 'Let's Get It On' (1973)
To start a fight or competition. (Informal)
"The two players trash-talked each other until they decided to get it on."
Primarily used in American English slang. The sexual sense is the dominant one. Can also rarely mean to start competing or fighting. Use with caution in professional or formal contexts.
Natural word combinations native speakers use most often.
The five tense forms you'll use most often.
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