blah

1 blah /ˈblɑː/ adjective
1 blah
/ˈblɑː/
adjective
Britannica Dictionary definition of BLAH
[more blah; most blah] chiefly US, informal
1 
: not interesting or unusual : dull or boring
2 
: without energy or enthusiasm
2 blah /ˈblɑː/ noun
plural blahs
2 blah
/ˈblɑː/
noun
plural blahs
Britannica Dictionary definition of BLAH
informal
1 
the blahs chiefly US : a feeling of being bored, tired, etc.
2 
[noncount] : silly or meaningless talk
◊ Blah is usually repeated to suggest that what someone is saying is unimportant or boring.