The Collaborative International Dictionary of English v.0.48:
once-over \once-over\ n. a swift cursory examination or inspection; as, I gave him the once-over. Syn: look-over. [WordNet 1.5]WordNet (r) 3.0 (2006):
once-over n 1: a swift cursory examination or inspection; "I gave him the once-over" [syn: once-over, look-over]