sudo rm -rf ~/.npm ~/.nvm ~/node_modules ~/.node-gyp ~/.npmrc ~/.node_repl_history
sudo rm -rf /usr/local/bin/npm /usr/local/bin/node-debug /usr/local/bin/node /usr/local/bin/node-gyp
sudo rm -rf /usr/local/share/man/man1/node* /usr/local/share/man/man1/npm*
sudo rm -rf /usr/local/include/node /usr/local/include/node_modules
sudo rm -rf /usr/local/lib/node /usr/local/lib/node_modules /usr/local/lib/dtrace/node.d
sudo rm -rf /opt/local/include/node /opt/local/bin/node /opt/local/lib/node
sudo rm -rf /usr/local/share/doc/node
sudo rm -rf /usr/local/share/systemtap/tapset/node.stp

brew uninstall node
brew doctor
brew cleanup --prune-prefix

$ nvm uninstall 8.8.1

Essentially you'd need to reverse the steps in install.sh - remove any nvm lines from ~/.bash_profile (and/or ~/.profile), rm -rf ~/.nvm, and either reopen your shell, or re-source your bash profile.

However, simply removing the nvm commands from your .bash_profile or .profile should be more than sufficient.

someone else said this:

rm -rf ~/.nvm
rm -rf ~/.npm
rm -rf ~/.bower

npm uninstall <package_name>

In IOS terminal:
brew uninstall node

Use sudo if ask for permitions

// Removing Manually if nvm still gives the same list of installed versions as before

cd ~/.nvm/versions/node
sudo rm -rf v4.2.3/