The story
From Chimpy (“George W. Bush”) + Mc- + flightsuit. Referring to the flightsuit that Bush wore in his "mission accomplished" stunt in 2003.
Etymology from Wiktionary, CC BY-SA 4.0.
Chimpy McFlightsuit
Today it means: George W. Bush (born 1946), the 43rd president of the United States (2001–2009). Full definition →