Don't fool around vs Focus

When to use each in English, with meaning, register, and examples.

Don't fool around

InformalBeyond 10,000 (less common)

Focus

Top 1,000 (very common)A2verb
Most formal: FocusMost common: Focus
 Don't fool aroundFocus
Pronunciation🇬🇧 //dəʊnt fuːl əˈraʊnd//🇺🇸 //doʊnt fuːl əˈraʊnd//🇬🇧 /["/ˈfəʊkəs/","/ˈfəʊkəsɪz/","/ˈfəʊkəst/","/ˈfəʊkəsɪŋ/"]/🇺🇸 /["/ˈfəʊkəs/","/ˈfəʊkəsɪz/","/ˈfəʊkəst/","/ˈfəʊkəsɪŋ/"]/
MeaningDon't waste time or play instead of being serious.The center of attention or interest.
ExampleYou need to finish your homework, so don't fool around anymore!I need to focus on my homework to finish it before dinner.
RegisterInformalNeutral
How commonBeyond 10,000 (less common)Top 1,000 (very common)
CEFR level-A2
Part of speechverb
Collocationsfool around with, don't fool around, fool around instead, fool around at workespecially, heavily, largely, need to, try to, decide to, on, upon, highly focused, tightly focused, narrowly focused, hard, intently, automatically, try to, on, upon
Antonyms-distraction, scatter, indifference
Common mistakesUsed too seriously in formal contexts., Confused with 'fooling around' meaning to play or have fun instead of being serious., Misheard as 'don't fall around'.'Focus' is often confused with 'concentrate.', Learners sometimes say 'focus in' instead of 'focus on.', Misusing 'focus' as a noun in places where an adjective form is needed.
Usage notesThis phrase is often used among friends or in casual settings, where seriousness is needed. Avoid using it in formal situations or with people who prefer a serious tone.Used in both formal and informal contexts. In formal writing, it may refer to a study or topic. In casual conversations, it can refer to personal attention.

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Don't fool around
Focus

Frequently asked questions: Don't fool around vs Focus

What's the difference between Don't fool around and Focus?

Don't fool around: Don't waste time or play instead of being serious. Focus: The center of attention or interest.

Which is more formal: Don't fool around and Focus?

Focus is the most formal of these.

Which is more common: Don't fool around and Focus?

Focus is the most common in everyday English.

Can you show an example of each?

Don't fool around: You need to finish your homework, so don't fool around anymore! Focus: I need to focus on my homework to finish it before dinner.

Can I use Don't fool around and Focus interchangeably?

Not always. Don't fool around and Focus are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.