Top Secret
When a woman (or man) is fellating another man (or woman) and there are other parties involved in conversation with, or adjacent to the recipient that are not privy to the current action.
Example:
That bitch done gave me head under the dinner table, call that top secret. (with some heavy 808's and trap style beat)
That bitch done gave me head under the dinner table, call that top secret. (with some heavy 808's and trap style beat)