Earthisms
Dollars mentioned quite a few times
Bucks (money)
Cents, in the O'Reilly episode
O'Reilly name, other earth names
Irish Accent
Leprachauns
'Best China' (crockery) the couple who set someone up for murder episode
Props - tv, phone, radio, cars, etc etc etc
Horse racing
Alcoholic drinks
Pharmacy
Various same animal types
Edit
I should add chess, as it was a big part of one episode.