|1.||random as pi|
Incredibly random, in the modern sense of unexpected or unimportant, given that pi, 3.14159 etc., is a famously random number.
Dude! That random chick I met at the VD clinic took me dancing last night and the place was random as pi!
Our cupcake flavours are as random as pi.
555-5555? Your phone number is random as pi! Or is it?