(CNN) - Chris Christie wants Jon Corzine to "man up" and come right out and say the New Jersey Republican gubernatorial candidate is fat.
Speaking on Don Imus' morning show Thursday, Christie called alleged efforts by the Corzine campaign to subtly invoke his weight "silly."
"If you're going to do it, at least man up and say I'm fat," Christie said on the show. "Afterwards [Gov. Corzine] wusses out and says, 'Oh no, no, I didn't mean that, I don't know what you're talking about.' Man up - if you say I'm fat let's go, let's talk about it."
In a Corzine ad released last month, a rotund Christie is shown emerging from a car in slow motion shortly after the narrator declares the former federal prosecutor "threw his weight around" to get government favors.
Corzine has insisted the ad is not meant to be a reference to Christie's weight but rather what the New Jersey Democrat describes as the "special treatment" he procured from his position.
But in an interview with CNN's Wolf Blitzer Monday, Corzine said that in retrospect, the ad should have used different wording than "threw his weigh around."