The Talmud refers to Jesus being a bastard, which is, of course, a skeptical take on the Virgin Birth. F. F. Bruce summarized how the Talmud described Jesus:
According to the earlier Rabbis whose opinions are recorded in these writings, Jesus of Nazareth was a transgressor in Israel, who practiced magic, scorned the words of the wise, led the people astray, and said he had lot come to destroy the law but to add to it. He was hanged on Passover Eve for heresy and misleading the people. His disciples, of whom five are named, healed the sick in his name.
It is clear that this is just such a portrayal of our Lord we might expect from those elements in the Pharisaic party which were opposed to Him. Some of the names by which He is called bear witness directly or indirectly to the Gospel record. The appellation Ha-Taluy (‘The Hanged One’) obviously refers to the manner of His death; another name given to Him, Ben-Pantera (‘Son of Pantera’), probably refers, not (as has sometimes been alleged) to a Roman soldier named Pantheras, but to the Christian belief in our Lord’s virgin birth, Pantera being corruption of the Greek parthenos (‘virgin’).’ This does not mean, of course, that all those who called Him by this name believed in His virgin birth.