I’ve noticed a feature of the speech of both Stephen Colbert and Jon Stewart that seems a bit strange to me. Pay attention to how he Colbert pronounces his B’s in the following:

Normally this consonant would be pronounced as [b], just a regular stop, but Colbert seems to often use something like the trill [B]. Think of making the sound of a motorcycle by vibrating your lips, that’s the sound. For instance, at 3:16 when says breezy.

I’m not really sure what’s happening here. Maybe this is actually normal and I’ve just not noticed. It could also be a dialect change in progress but it seems kinda strange that I’ve heard this with Jon Stewart as well since they come from different parts of the country. It could also be just some mysterious ideolectal feature of fake news hosts. Who knows.