back out (
http://definr.com/back out)
v 1: move out of a space backwards; "He backed out of the
driveway"
2: make a retreat from an earlier commitment or activity;
"We'll have to crawfish out from meeting with him"; "He
backed out of his earlier promise"; "The aggressive
investment company pulled in its horns" [syn:
retreat, {pull
back},
back away,
crawfish,
crawfish out, {pull in
one's horns},
withdraw]