to  have  something going with  somebody
have
hæv
hāv
something
sʌmθɪng
samthing
going
gəʊɪng
gewing
with
wɪð
vidh
somebody
sʌmbədi
sambēdi
[have] something going

Definition & Meaning of "have something going with somebody "in English

to have something going with somebody
01

to be involved in a romantic or casual relationship with someone, often without it being very serious or officially defined 

Idiom
Informal

What is the origin of the idiom "have something going on with someone" and when to use it?

The origin of the idiom "have something going with someone" is uncertain. It likely developed as a colloquial expression in English language over time to describe a romantic or intimate relationship between two individuals. It suggests that there is mutual interest, attraction, or a developing relationship between them. It can be used to describe various stages of a relationship, from initial dating to a more serious commitment. For example, "They have something going with each other" means they are romantically involved or exploring a potential relationship.

Examples
I think he's got something going on with her. 
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