Named after the late night comedian Stephen Colbert.
The Colbertian Accent (pronounced Col-ber-y-en) is an accent in which the speaker fails to pronounce the t at the the end of a word in which the previous two letter are either "or" or "er."
Colbert Report

Pronounced Colbear Repoor. This is a Colbertian Accent
by a no lifer August 9, 2009
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