now or never
now
ˈnaʊ
naw
or
ɔ:
aw
ne
ne
ver

Definition & Meaning of "now or never"in English

now or never
01

used to suggest that right now is the only time a person has a chance for taking an opportunity or else they lose it forever 

now or never definition and meaning
Idiom

What is the origin of the idiom "now or never" and when to use it?

The idiom "now or never" dates back to the 16th century and has its origins in the English language. It is a combination of the adverb "now," indicating the present time, and the adverb "never," denoting the absence of any future opportunity. The phrase is commonly used in personal goals, such as pursuing dreams, making life-changing choices, or expressing feelings to someone.

Examples
If you want to apply for the grant, it's now or never. 
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