ti·ger 
(tīgər)
(tīgər)n.
1.
a. A large carnivorous feline mammal (Panthera tigris) of Asia, having a tawny coat with transverse black stripes.
b. Any of various similar wild felines, such as the jaguar, mountain lion, or lynx.
2. A person regarded as aggressive, audacious, or fierce.
[Middle English tigre, from Old English tigras, tigers, and from Old French tigre, both from Latin tigris, from Greek, of Iranian origin; see steig- in the Appendix of Indo-European roots.]
tiger·ish adj.
tigerPanthera tigris