Lubricant

[Jessica]

That which lubricates; specifically, a substance, as
oil, grease, plumbago, etc., used for reducing the friction of the
working parts of machinery.

[Tanya Shivari]

A really glossy slick gel, sometimes found in flavors which you put on a males penis to make it easier, faster and harder while having regular, oral or butt sex.

[Hina Muqadas]

a slick substance that is put on a males penis to make it easier to put in a vagina.

[Hina Muqadas]

I have 50 bottles of it in my house

[Luis Fok]

A substance used for lubricating an engine or component, such as oil or grease.

[Oralee]

Lubricant can be used to avoid breaking a condom during vaginal or anal sex. To be compatible with condoms, it should be mentioned on the lubricant, usually water based or [silicone] based. It may be better than saliva but has to be renewed also. However if you are only looking for casual [hookups], it is better that a woman chooses a lubricant that she tried alone first, since some people have [allergic] reactions (even with organic lubricant) and guys could lose the opportunity to get laid if it happens!

[Becky]

a liquid such as oil that is used to make the parts of an engine move easily together, or a substance put on any surface to help it move more easily against another one