Maybe he had trouble reciting the elfabet.
Brandon Touchet, 34, was wearing what appears to be a "Buddy the Elf" costume when he was pulled over at 3 a.m. Sunday by deputies with Louisiana's Lafayette Parish.
According to an arrest report obtained by The Smoking Gun, Touchet -- who was driving 60 mph in a 40 mph zone -- had a BAC of .124. He was charged with speeding and operating under the influence.
Touchet isn't the only person to allegedly misbehave in Christmas garb recently. Saturday night, a crowd of rowdy Santas was caught on tape brawling on the streets of New York CIty.
And in November, a mall Santa was arrested after being accused of groping a female elf.
CORRECTION: A previous version of this story incorrectly stated the incident took place in Parish County. It took place in Lafayette Parish.