1. In House's office, House tells Foreman to go and search a kid's room for drugs.
House:"I'm sure you know all the good hiding spots."
Foreman:"I've never done drugs."
This is based on the Black = Drugs idea, and House is basically saying "You're black, so you use drugs" which is ironic considering that House is a Vicodin addict [Vicodin is 3/4 as strong as morphine.]
2. Again, in House's office, discussing a patient.
Chase:"I'm Australian."
House:"You've got the Queen on your money, you're British."
A snotty remark, but it is something that Americans do say to Aussies, Kiwis, and Cannucks.