Daughter asked: Who did you clap last night

[Plutotheplanet]

My daughter is in year 4. A couple of year 6 kids walked up to her and asked 'Who did you clap last night?'. According to her there are a number of year 6 kids asking this and walking away giggling. Is this a euthamism for sex? Or worse? Or just something silly they're saying? Anyone else come across this phrase?

After the first page on Google going on about clapping for carers, there are a few urban dictionary/slang like references to it being having sex.

I think it's a reference to sex, please speak to the school.

Thanks. Kind of what I thought too. Not worried about my daughter, as she was just a bit bemused and didn't know what they were talking about. Given the kids saying it are only 10/11, I am thinking they're just testing a new term they've learned out. Finding it funny as obviously younger kids wouldn't know what they're talking about. I have asked my daughter to let me know if it happens again though.