1. A plural of the onomatopia "knock" or in its adverb, "knocking" or noun "knocker(s)."
2. An informal of the
female breasts, especially in old English slang used in
popular British comedies as noticed, such as "Bottom."
"You
see that for
bird over there? Look at the knockers on her."
"Rather than knocking with the
knuckles, why not use the door knockers?"