[...] she frowned a displeased frown and told me for heaven's sake to stop goggling like a dead halibut. [...] She left me fogged and groping for the inner meaning, and I could see from Aunt Dahlia's goggling eyes that the basic idea hadn't got across with her either. [...] I didn't want to be hampered by an audience. When you're pushing someone into a lake, nothing embarrasses you more than having the front seats filled up with goggling spectators.
Source: wiktionary