มีอะไรกัน(mee à-rai gan)

Meanings

1VerbB2

[to] have sex (with each other)

to engage in sexual intercourse with each other; a euphemistic or colloquial way to say ‘sleep together’

Examples

He said that he and his girlfriend slept together for the first time when they went to the beach together.
2VerbB2

[to] have something going on (between two people)

to be romantically or sexually involved with someone in an unspecified way; implies intimacy without stating details

Examples

I saw them go to the movies together, just the two of them. I wonder if they have a thing going on.