The meaning of this word as found in the Scriptures is worthlessness, and hence reckless, lawlessness. The expression son or man of Belial must be understood as meaning simply a worthless, lawless fellow. The term as used in (2 Corinthians 6:15) is generally understood as an appellative of Satan, as the personification of all that was bad.
BELIAL
Meaning of BELIAL in English
Smith's Bible English dictionary. Английский библейский словарь Смита. 2012