IDIOM ►

swallow something, take something hook, line and sinker

Meaning 1
The fish took part of the line, the sinker (weights) and the hook in his mouth.
Sentence 1
The golden trout took the fly hook, line and sinker. (This practically never happens.)
Meaning 2
to believe someone completely
Sentence 2
He told me he loved me and I believed him, hook, line and sinker.