The slip has blocked a 10m section of road and cut access to two properties since June 17.
Resident Trevor Young said inaction could put lives at risk on the popular tourist route.
''We've been trapped for a month and nothing's been done. I mean, a month's a month. Enough's enough,'' he said.
''I can't get the rubbish down. I can't do anything.
''There's a big tree stump in that slip that's due to fall on to Portobello Rd at any time. Someone's going to get killed over this.''
Mr Young and neighbour Kevin Murphy have been able to reach their homes only via the connecting driveway of neighbours, including Philip Burns.
Mr Young (63) said he had heart and general health problems and was concerned for his own welfare.
''If something went wrong with me, I'd be in big trouble. You couldn't get an ambulance up here now.
''You couldn't get a fire engine up either, and my place is surrounded by gorse. If it went up, half of Waverley would go up.''
Mr Burns said he had been quoted $7000 to clear the landslip, which he estimated was 100 tonnes.
The slip had come down from land at 240 Portobello Rd, owned by Steve Hawkins.
Mr Hawkins did not respond to requests for comment.
His lawyer, Todd Whitcombe, a partner at O'Neill Devereux, has written to neighbours warning them not to touch the debris until it stabilised, or risk liability for any further damage.
Mr Whitcombe told the Otago Daily Times responsibility for the slip had not been resolved, and discussions were continuing.
More meetings were planned this week. There was ''a lot'' of water flowing on to Mr Hawkins' property from subdivisions above, and continuing down on to Portobello Rd, and ''that's part of what the discussions with council are about'', he said.
Dunedin City Council roading maintenance engineer Peter Standring said the slip was on a private road and not the council's responsibility, but it had been checked and was stable.
''It's the old Harington Point Rd and it's became a private driveway on road reserve.
''We had a precautionary look and the slip poses no real threat. It's something the neighbours are going to have to resolve.''
