Jeff Fisher's birthday ruined on Twitter

Thearon W. Henderson / Getty Images Sport / Getty

Los Angeles Rams head coach Jeff Fisher and his mustache had their birthday ruined by Twitter on Thursday after a good-natured congratulations tweet led to fans lambasting the perpetually .500 coach.

Fisher (58) and mustache (41) were tweeted a good ol' HBD by the NFL Now Twitter account, only to have some Internet denizens ruin the celebration with their mean and accurate comments.

Chill, @endtrevor.

Guys, chill.

Hey, guys come on.

Fisher has yet to clean the birthday cake crumbs from his 'stache and respond.