Definition
When someone is "stiff," it means they're noticeably drunk, often to the point of being clumsy or rigid. It suggests a level of intoxication that affects physical coordination and movement. It's like your limbs are made of wood. It's stronger than 'tipsy' but not as extreme as 'smashed'. You might notice someone walking with difficulty or slurring their speech. This use is not as common as other terms.