That's pretty self explanatory. Jake's accusing Rick of being Lucky and not as good as him..i.e. pulling a gold horseshoe out o' his posterior(that's butt). Congrats to Rick,good job.
"I said, now, I said ,pay attention boy!"
The cure for anything is salt water - sweat, tears, or the sea Isak Dinesen If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most. E. B. White