no-nonsense
adjective
no-non·sense ˈnō-ˌnän-ˌsen(t)s 
-ˈnän(t)-sən(t)s
: tolerating no nonsense : serious, businesslike
a no-nonsense manager
Synonyms
- earnest
- grave
- humorless
- po-faced [British]
- sedate
- serious
- severe
- sober
- sobersided
- solemn
- staid
- uncomic
- unsmiling
- weighty
See all Synonyms & Antonyms 
Word History
First Known Use
1853, in the meaning defined above
no-nonsense
adjective
as in solemn
not joking or playful in mood or manner a no-nonsense gymnastics coach Synonyms & Similar Words
Relevance
- solemn
- stern
- serious
- professional
- earnest
- humorless
- unsmiling
- staid
- sober
- harsh
- distinguished
- po-faced
- strict
- sedate
- businesslike
- severe
- sobersided
- dignified
- weighty
- uncomic
- grim
- grave
- serious-minded
- gloomy
- elevated
Antonyms & Near Antonyms
- humorous
- playful
- jocular
- flippant
- funny
- joking
- facetious
- hilarious
- hysterical
- ridiculous
- flip
- comical
- riotous
- droll
- light
- ludicrous
- lighthearted
- goofy
- comic
- laughable
- uproarious
- kittenish
- ludic
- hysteric
- farcical
- antic
- risible
- frivolous
- zany
- scatterbrained
- screaming
- jesting
- puerile
- silly
- kooky
- wacky
- harebrained
- whacky
- flighty
- nutty
- fatuous
- crazy
- insane
- sidesplitting
- absurd
- foolish
- nonsensical
- mad
- lunatic
- loony
- sappy
- daft
- daffy
- brainless
- unwise
- jerky
- preposterous
- asinine
- witless
- dotty
- featherbrained
- balmy
- cockeyed
- light-headed
- cuckoo
- screwball
- senseless
- kookie
- half-witted
- looney
- weak-minded