Adjective: unamusing ,ún-u'myoo-zing
- Not funny; especially failing to achieve the intended humour
"a very unamusing joke";
- unfunny
- So lacking in interest as to cause mental weariness
"The lecturer's unamusing anecdote put everyone to sleep";
- boring, deadening, dull, ho-hum [informal], irksome, slow, tedious, tiresome, wearisome, deadly [informal], draggy [informal], mind-numbing
See also: humorless [US], humourless [Brit, Cdn], lame, lameo [informal], meh [informal], samey [Brit, informal], unhumorous, uninspiring, uninteresting