Pop-pop

[PussyCat]

A loving term given to ones grandfather. Pop-Pop is the best grandparent you could ask for-loving, kind and doting. Pop-Pop will teach you about music, film, culture, and family values. Pop-Pop will force you to watch hours of boring family movies, and you will secretly love it! Pop-Pop will act is if he is very frugal, but is truly generous beyond belief! If you are blessed enough to have a Pop-Pop you are very lucky!

[Mark Zuckerberg]

A versatile word. Can be a verb (to pop-pop) or a noun (the act of making pop-pop).

Means sex.

Duh.