To take the plunge is to finally commit to something you have been putting off. Take the plunge and apply.
The hesitation is built into the phrase, since nobody takes the plunge on something easy. It is used most about marriage, moving and starting a business.
1phrasetake the plungeTo finally commit to something you have been putting off.
“After two years of talking they decided to take the plunge and buy it.”
take the plunge is a phrase.
Practised in Idioms