noun, masculineplural: tumblrs
tumblr is masculine in French.
a microblog created on Tumblr; tumblelog
“En réaction, Anja Reschke a compilé les commentaires les plus virulents sur un tumblr, divulguant l'identité de leurs auteurs et renvoyant même vers leurs pages Facebook.” — In response, Anja Reschke has compiled the most virulent comments on a Tumblr blog, revealing the identity of their authors and even linking to their Facebook pages.