This is a 'mangled metaphor'. It mixes up 3 idioms:
Piss on my leg and tell me it's raining
Piss on one's chips
Piss and vinegar
To deliberately and painstakingly go out of one's way to ruin a friend's chances of success. Usually done jokingly with reference to the opposite sex.
Piss on my leg and tell me it's raining
Piss on one's chips
Piss and vinegar
To deliberately and painstakingly go out of one's way to ruin a friend's chances of success. Usually done jokingly with reference to the opposite sex.
by fuguez September 26, 2009
Get the piss on my chips and tell me it's vinegar.mug.