What is Moon Over My Hammy?
1.
n. (mōōn ō'vər mī hām'ē)
Term for pulling one's pants down too far while displaying one's nude buttocks. Doing so will expose the man's genitalia, which hang below the displayed buttocks.
Oh, man, I think I traumatized the cheerleaders. My pants slipped all the way down and I gave them a "Moon Over My Hammy!"
See