sneakweed
A person who spreads rumors and sneaks around, without anyone noticing.
Jeff: Someones has been spreading rumors that Josh killed someone.
Matt: You know who?
Jeff: No.
Matt: I don't know. Don't go spreading this around, it may be the work of a sneakweed.
Matt: You know who?
Jeff: No.
Matt: I don't know. Don't go spreading this around, it may be the work of a sneakweed.