noun
big tiger; large tiger
Literal meaning: a physically large tiger. Not a common standalone word in modern Japanese; more often seen in names or fixed expressions.
動物園で大虎を見た。
I saw a big tiger at the zoo.
noun
heavy drinker; staggering drunkard
Idiomatic expression for a person who drinks heavily and becomes very drunk. Often used humorously or critically.
彼は酒を飲むと大虎になる。
He turns into a staggering drunkard when he drinks.
あの大虎は昨夜も店で騒いでいた。
That heavy drinker was making a racket at the bar again last night.