If point is end of line, expand abbreviation. If not, go to the end of line.

gistfile1.sh

typeset -A myabbrev
myabbrev=(
    "DN"  "&> /dev/null"
    "L"   "| $PAGER "
    "G"   "| grep "
    "S"   "| sed '_|_'"
    "R"   " rm "
    "M"   " mkdir "
    "C"   " cat "
    "TX"  " tar -xvzf "
    "TC"  " tar -cvzf "
    "RS"  "rsync -av --exclude '\#*' --exclude '*~' "
    "FX"  "find _|_ -print0 | xargs -0 "
    "PWD" ""
)

my-expand-abbrev() {
    if [ -z "$RBUFFER" ] ; then
        my-expand-abbrev-aux
    else
        zle end-of-line
    fi
}

my-expand-abbrev-aux() {
    local init last value addleft addright
    init=$(echo -nE "$LBUFFER" | sed -e "s/[_a-zA-Z0-9]*$//")
    last=$(echo -nE "$LBUFFER" | sed -e "s/.*[^_a-zA-Z0-9]\([_a-zA-Z0-9]*\)$/\1/")
    value=${myabbrev[$last]}
    if [[ $value = *_\|_* ]] ; then
        addleft=${value%%_\|_*}
        addright=${value#*_\|_}
    else
        addleft=$value
        addright=""
    fi
    if [ "$last" = "PWD" ] ; then
        LBUFFER=""
        RBUFFER="$PWD"
    else
        LBUFFER=$init${addleft:-$last }
        RBUFFER=$addright$RBUFFER
    fi
}

zle -N my-expand-abbrev
bindkey "^e" my-expand-abbrev