hook, line, and sinker
• used to emphasize that someone has been completely deceived or tricked.
• "he fell hook, line, and sinker for this year's April Fool joke"
Similar:
completely,
totally,
utterly,
entirely,
absolutely,
thoroughly,
wholly,
through and through,
one hundred per cent,
lock,
stock,
and barrel,
Opposite:
to a limited extent,
