Noun. To choke. To lose when you could have won. To not deliver when the pressure is on. Based on golfer Phil Mickelson's innate ability to choke when the pressure is on.
Did you see Shaq pull a Mickelson and totally miss those free throws at the end of the game?
noun: breasts on a man; imitation breasts on a man; a synonym for moobs, man-boobs, man-knockers - with the added twist of 'mock' meaning 'to imitate'.