smutter means: Use profane language while speaking so that others around you cannot hear. (in Community Dictionary, added by Maya Singh)
What else does smutter mean?
- Language of smutty; words loaded with innuendo and spoken in a mute manner. (in Community Dictionary, added by Álvaro Moya)
- Smuttslut, who is open to many men. (in Community Dictionary, added by Marc Dalton)