about face
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about′ face′
interj.
(used as a military command to perform an about-face.)
[1860–65]
a•bout-face
(n. əˈbaʊtˌfeɪs, əˈbaʊtˈfeɪs; v. əˌbaʊtˈfeɪs)n., v. -faced, -fac•ing. n.
1. (in close-order drill) a 180° turn from the position of attention.
2. a complete change in position, direction or attitude.
v.i. 3. to perform an about-face.
[1860–65, Amer.]