Someone who pretends to be gay, or makes 'Seedy gesture' eg. Cute bum.
Or someone who has something 'seedy' about them, like a dirtypedo 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 cute bum", smacks her on the ass. <--- very seedy