Someone who pretends to be gay, or makes 'Seedy gesture' eg. Cutebum.
Or someone who has something 'seedy' about them, like a dirty pedo moe.
someone who gets with a lot younger people, or extremely older is considered 'Seedy'.
someone who gets with lots of opposite sex
someone who txts lots of the opposite sex
old male to youngish female, "you have a cutebum", smacks her on the ass. <--- very seedy