on the piss meaning

• (slang)
    Engaged in a bout of heavy drinking
• 
  [British slang]
  on the piss
  Phrs. Getting drunk. E.g."He's got a hangover after going out on the piss last night.”
  

• When Holman left the dressing room, slipped and fell on the piss.
• ,I can assure you I will do my best not to lose my temper, and I have been very careful to not get into editing disputes when on the piss.

• "on the piss" meaning in Chinese: [网络] 在小便
• "on the piss" meaning in Japanese: 飲んだくれて、酔って