Venus in Scorpio is a term in astrology that means Venus is in one's zodiac sign. If a man has the Venus in Scorpio sign/planet pair, he would tend to be intense and emotional.
According to astrological theory, other aspects associated with people of this sign/planet pair are the ability to give one his complete attention and remain very focused. These people are typically very intense and have a strong need to be in charge of and control their significant others, but with that need comes a very high degree of loyalty. A Venus in Scorpio man takes a relationship very seriously, almost to the point that it consumes him.