One who sucks cocks and swallows the pure energy or semen. A true Sperm Vampire does this deed to stay alive, kinda like a ho-bag.
Bill: Did you know Jamsession is a sperm vampire?
Fred: No way! How can you tell?
Bill: The cumstache that he is always sportin.
Fred: No way! How can you tell?
Bill: The cumstache that he is always sportin.
by The Jewgle and Mr. Forbes August 25, 2009