In a harsh and pronounced way; severely: He cusses her out something fierce/ She came at me something awful (entry form 1909+, variant 1898+)
The little consul was deathly pale, and there was something fierce and authoritative in his look.
"Yes, it certainly was something fierce, that cabin," went on the narrator.
They're all up in the air down there and howling something fierce.
My limb pains me something fierce; very close veins is what I have.
"It's something fierce where all these forlorn people come from," said Tubby.
The lights and shadows of this wicked world are something fierce.
He kids me, too, something fierce; and he give me the case note.
Gee, though, they'll be something fierce now they've learned how to walk.
When it's working, this metal must cool off something fierce.
It's something fierce when it begins to break bad, ain't it?