Shampoo banana 

Local term for the "twin cities" of Champaign and Urbana in Illinois. These two cities are usually just considered one area, but Champaign-Urbana sounds too formal, so some people just say this instead. People from anywhere else usually don't get it. These people often pronounce the S in Illinois as well.

Ted: Where you live?
Lisa: Shampoo banana!
Ted: ...?

Shampoo banana by Miss Leslie April 27, 2006

Shampoo banana 

a much better version of champaign urbana. only true townies and members of illini-nation are allowed to use this word. it has origins in 410 E Healey, the social circles of green street, and the elite socialites of Kams and Lion.

Sam: Are you from Champaign or Urbana?
Nick: No, I'm from Shampoo banana
Ani: I'm moving out

Shampoo banana by sid6969 October 27, 2021