all, completely, etc. at sea
all at sea
Puzzled, perplexed, or completely confused (about a subject or some task at hand). I tried to do well in this class, but I've been all at sea since we started.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
all, completely, etc. at ˈseaconfused; not organized: We’re still completely at sea trying to understand the new regulations.
See also: sea
Farlex Partner Idioms Dictionary © Farlex 2017