Dry sex?

What is dry sex? I've heard like guys I hang out with talk about it before but still im confused about what it is and how its done and stuff. But im too shy to ask them.
Can anyone health?

dry sex is when two people rub there genitals togeather, in the act of sex, but with no intercorse. it can be with clothes on or off

its just like sex buh dry
its basically just grinding up on each other

Yes, they're both correct. Just rubbing on each other. Try to wear something thin to where you can actually feel it. Jeans don't work that well lol.