Talking rubbish.
Usually rubbish spoken by a nob.
hence nobsense.
"that guys a nob...he's talking nobsense".
3๐ 6๐
To talk utter balderdash
derived from nob, (vulgar, slang variant spelling of knob) meaning penis, and sense meaning possible meanings
hence nob sense, to have all the sense of a talking penis
I saw that Donald Trump on CNN again spouting fuckinโ nobsense