rabid
adjective
[ ˈrabɪd ]
• having or proceeding from an extreme or fanatical support of or belief in something.
• "the show's small but rabid fan base"
Similar:
extreme,
fanatical,
overzealous,
over-enthusiastic,
extremist,
violent,
maniacal,
wild,
passionate,
fervent,
diehard,
uncompromising,
intolerant,
unreasonable,
illiberal,
bigoted,
prejudiced,
biased,
partisan,
one-sided,
raving,
gung-ho,
swivel-eyed,
perfervid,
• (of an animal) affected with rabies.
• "her mother was bitten by a rabid dog"
Origin:
early 17th century (in the sense ‘furious, madly violent’): from Latin rabidus, from rabere ‘to rave’.