When a secretary performs fellatio on her boss from underneath his work desk.
Dude 1: "Dude the boss wouldn't let me in his office and his secretary was gone, kinda weird..."
Dude 2: "You didn't know? He gets under the desk specials every other day around three o'clock"
the act of furthering your career by engaging in an inappropriate act with your manager or boss.
Chuck was planning on firing Sally until she unzipped his pants and gave him an under-the-desk incentive. She not only kept her job, she also got a raise.