Lindsay Lohan: I'm Servicing the Community ... By Showing Off My Body

Lindsay Lohan's mosquito virus seems to be chikun-GONE-ya ... now she just needs to focus more on finishing her community service, and less on her ass -- or it could land her in jail.

Lilo posted a half naked pic Saturday afternoon on Instagram ... with a caption that almost mocks her own defense ... writing, "#mycalvins are helping me fight off chikungunya (kissy face emoji) hehe."