function up {
        local ups="."
        for((i=0;i<${1:-1};i++)); do
    		ups="${ups}/.."
    	done
    	cd "$ups"
    }

  # Quick ../../.. from https://github.com/blueyed/oh-my-zsh
  resolve-alias() {
    # Recursively resolve aliases and echo the command.
    typeset -a cmd
    cmd=(${(z)1})
    while (( ${+aliases[$cmd[1]]} )) \
              && [[ ${aliases[$cmd[1]]} != $cmd ]]; do
        cmd=(${(z)aliases[${cmd[1]}]})
    done
    echo $cmd
  }
  rationalise-dot() {
    # Auto-expand "..." to "../..", "...." to "../../.." etc.
    # It skips certain commands (git, tig, p4).
    #
    # resolve-alias is defined in a separate function.

    local MATCH # keep the regex match from leaking to the environment.

    # Skip pasted text.
    if (( PENDING > 0 )); then
        zle self-insert
        return
    fi

    if [[ $LBUFFER =~ '(^|/| ||'$'\n''|\||;|&)\.\.$' ]] \
           && ! [[ $(resolve-alias $LBUFFER) =~ '(git|tig|p4)' ]]; then
        LBUFFER+=/
        zle self-insert
        zle self-insert
    else
        zle self-insert
    fi
  }
  zle -N rationalise-dot
  bindkey . rationalise-dot
  bindkey -M isearch . self-insert 2>/dev/null

It works for any command, cp/mv/whatever.

There may be nicer versions, certainly shorter versions are there if I search "rationalise-dot" in Google.