The act of having sex with someone over 65 years of age
Jim: how was your weekend Tom?
Tom: it was great, I had an aggressive dusty doorknob with my grandparents!
Dusty doorknob a person who gives bad vibes or just basically dusty
Kierra is a dusty doorknob she give me bad vibes and always be dusty
An idiot, used as alternative to "dumb fuck"
How could you not do the simplest thing, you dusty doorknob!