Serena Williams -- Check Out My Sick Vacay Home ... AND MY HEALTHY ASS

Serena Williams might have lost her last time on the court ... but here's more proof she's winning in life ... the RIDICULOUS crib she's calling home while on vacay in Jamaica.

The 10,000 sq ft spot is located in Ocho Rios, Jamaica and rents for an insane $20k per week ... but with 7 bedrooms and 9 bathrooms it sleeps 14 freakin' people ... so you can go halfsies.

It ain't just space she's buying though ... according to the listing site FlipKey.com ... the home gives you access to a pool, hot tub, and get this ... your own private boat to cruise the high sea.

Serena's been Snapchatting like crazy from inside the place ... including the now instant classic vid of her reppin' the USA to the fullest ... in an ASSTACULAR star-spangled one piece swimsuit.

Of course, we included that below ... so you can see the home in the flesh. All its beautiful perfect flesh.