Not sure if this is a font, but here's something similar just in case.
It's just when someone wants a topic to be back on the first page, so they "bump" it
You can do that every 24 hours if you want.
@congrim, don't mind koeiekat, he's your regular internet-troll-asshole, as you can unfortunately see in almost all his posts.
Fuseau horaire : CEST. Il est actuellement 06:41