What is 90-10?
When someone bends you over 90 degrees and fucks you in the ass 10 inches. In other words, getting fucked over.
Denise told me she could get us into that new club on Saturday, but then she gave me the 90-10 by sticking me with both of our covers.
Lisa gave me the 90-10 when she set me up on a blind date with a total tool.