non·sense 
/ˈnɑ:nˌsɛns/ noun
/ˈnɑ:nˌsɛns/ noun [noncount] 1 : words or ideas that are foolish or untrue
▪ I don't know why you believe that nonsense about certain numbers being unlucky. ▪ The stories she told about him are sheer/utter/complete/absolute nonsense. [=the stories are completely false] ▪ He says he was attacked by a frog? Nonsense. [=I do not believe that he was attacked by a frog] ▪ She thinks that astrology is nonsense. ▪ The rumors are a lot of nonsense. [=they are not true] ▪ Don't listen to him. He's talking nonsense. 2 : behavior that is silly, annoying, or unkind
▪ He was not in the mood to put up with any nonsense from his little brother. ▪ If they start pushing each other or some such nonsense, send them to their rooms. ▪ She doesn't take any nonsense from anyone. — see also no-nonsense 3 : language that has no meaning
▪ Many of the words in the poem are nonsense. ▪ I understood so few of the words they were using that the conversation sounded like nonsense to me. — often used before another noun ▪ When he didn't know the words, he sang along using nonsense syllables. ▪ Her stories are full of nonsense words that kids have fun trying to say. ▪ nonsense verse/poems/rhyme [=silly poetry that often uses words that are not real words]
▪ I don't know why you believe that nonsense about certain numbers being unlucky. ▪ The stories she told about him are sheer/utter/complete/absolute nonsense. [=the stories are completely false] ▪ He says he was attacked by a frog? Nonsense. [=I do not believe that he was attacked by a frog] ▪ She thinks that astrology is nonsense. ▪ The rumors are a lot of nonsense. [=they are not true] ▪ Don't listen to him. He's talking nonsense.
▪ He was not in the mood to put up with any nonsense from his little brother. ▪ If they start pushing each other or some such nonsense, send them to their rooms. ▪ She doesn't take any nonsense from anyone. — see also no-nonsense
▪ Many of the words in the poem are nonsense. ▪ I understood so few of the words they were using that the conversation sounded like nonsense to me. — often used before another noun ▪ When he didn't know the words, he sang along using nonsense syllables. ▪ Her stories are full of nonsense words that kids have fun trying to say. ▪ nonsense verse/poems/rhyme [=silly poetry that often uses words that are not real words]
make (a) nonsense of
Brit : to cause (something) to no longer be effective : to take away the value or usefulness of (something)
▪ The lack of guards makes a nonsense of the security checkpoint.
▪ The lack of guards makes a nonsense of the security checkpoint.
