Some say chicken chicken chicken, others say subway, subways, subways. Chicken Chicken Chicken Chicken (the academic study) by Doug Zongker, published in the Annals of Improbable Research, vol. 12, no. 5, September-October 2006, led to Chicken Chicken Chicken, the lecture by Zongker (the lecture was part of the Annals of Improbable Research session at the 2007 Annual Meeting of the American Association for the Advancement of Science):
The reasoning behind Subways Subways Subways is a bit more complex. The lecturer is Toronto mayor Rob Ford:
BONUS: Subway Chicken
BONUS: Buffalo buffalo etc.