poorly-endowed slimeball 这是什么意思阿？

前些阵子看见一个广告牌，是妻子写给丈夫的，但没明白。请各路高人谁能帮助翻译一下，谢谢！

Hi Steven,
Do I have your attention now?
I know all about her, you dirty, sneaky, immoral, unfaithful, poorly-endowed slimeball. Everything's caught on tape.
your(soon-to-ex)wife,
Emily
P.S.I paid for this bill board from OUR joint bank account.

poorly-endowed slimeball 这是什么意思阿？ They are endowed with high artistic talents. The official lives in a poorly-decorated department, ______ the south. heaven//endowed//talents//eventual这4个单词分别是什么意思?怎么读?