[Kyobanim]

There's a Kung Fu style called "Drunken Master". Jackie Chan used it in a movie I think was called Drunken Master. Any style is practical if the user is proficient. Drunken fighting is essentially stumbling around like you're drunk and using the unpredictability of the motion to apply attacks on the opponent.

Found this on a site about Zui Quan. Looks like another name for Drunken Master.

In Zui Quan or the drunkard boxing, boxers falter, waddle, fall and sway just like drunkards.
Zui Quan can be used for both fighting and maintaining health. However, the drunkard boxers go out of their way to stress the combative side of their style. They blend a series of movements, actions and skills of the martial arts and try to confuse their opponents with special skills which often lead them to surprise triumphs.

Execution of the drunkard boxing demands extreme flexibility of the joints as well as suppleness, dexterity, power and coordination all of which can be developed in the course of practice.
The main feature of the drunkard boxing is to hide combative hits in drunkard-like, unsteady movements and actions so s to confuse the opponent. The secret of this style of boxing is maintaining a clear mind while giving a drunken appearance.

Drunkard boxers are required to be responsive with good eyesight and fist plays. They move in unconnected steps but with a flexible body combining hardness and suppleness. They have to be fast to get the better of their opponents but their main tactic is to feign defence while trying to attack and aiming in one direction but attacking in another. Various degrees of drunkenness are demonstrated by different ranges of movements and expressions in the eye.