Now John wore a garment of camel's hair and a leather belt around his waist, and his food was locusts and wild honey. (Matthew 3:4)John the Baptist didn't care much for fashion. He was a prophet, and his clothing matched his mission. John's clothing was similar to his predecessor Elijah, who wore "a garment of hair, with a belt of leather about his waist" (2 Kings 1:8, also see Zechariah 13:4).
John was not a king, nor did he pretend to be one. Jesus, later in his ministry, spoke to the crowds about John, saying, "What then did you go out to see? A man dressed in soft clothing? Behold, those who wear soft clothing are in kings' houses. What then did you go out to see? A prophet? Yes, I tell you, and more than a prophet" (Matthew 11:8-9).
The gospels portray John as a rough kind of man. He didn't live in a king's house, but in the wilderness. He didn't eat kingly food; instead he ate locusts and wild honey.
Locusts are not something I eat for dinner, and if you live in the West, I'm guessing you don't either. But in the East, locusts don't have the same stigma attached to them. In fact, locusts are listed as one of the allowable foods in the Levitical Law (and if you're still not so sure about eating locusts, don't worry, grasshoppers are also permitted): ...you may eat: the locust of any kind, the bald locust of any kind, the cricket of any kind, and the grasshopper of any kind (Leviticus 11:22).
John also ate raw honey. The Old Testament makes many references to Israel being a land "flowing with milk and honey." As such, John must have had plenty of fructose and glucose to digest in between his locust feasts. Perhaps sometimes he combined locusts with honey for his main dish. You can imagine the vast (well, sort of...) number of recipes he must have had: honey roasted locusts, honey dipped dried locusts, maybe even a honey-locust flavored drink.
Now don't get me wrong, I'm sure John ate something other than locusts and honey. However, for at least the time of his ministry, he was known for having a diet primarily consisting of locusts and honey.
The words that Jesus spoke later in His ministry were true. John certainly "did not come eating or drinking" (Matthew 11:18). John's diet was simple. He was a voice, calling out in the wilderness, and what he ate and wore matched his mission.