Search Result for "fall open":
Wordnet 3.0

VERB (1)

1. open involuntarily;
- Example: "His mouth dropped open"
- Example: "Her jaw dropped"
[syn: drop open, fall open]



WordNet (r) 3.0 (2006):

fall open
    v 1: open involuntarily; "His mouth dropped open"; "Her jaw
         dropped" [syn: drop open, fall open]