buffaloed
Puzzled, perplexed, or completely confused (about a subject or some task at hand). I tried to do well in this class, but I've been buffaloed since we started.
double buffalo
slang The speed limit of 55 miles per hour. The US nickel, which is worth five cents, at one time featured a picture of a buffalo. Whoa, whoa, cool it with the double buffalo—the speed limit here is 25!
double nickels
slang The speed limit of 55 miles per hour. "Nickel" refers to the US five-cent coin. Whoa, whoa, cool it with the double nickels—the speed limit here is 25!