To chew something loud and obnoxiously.
The english mastiff puppy liked to yonk on her bone.

My daughter would yonk her gum until I told her to chew with her mouth closed.
by bugsy555 October 07, 2012

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Top Definition
An extrememly long time. (noun)
Dude, I haven't spoken to you in yonks!
by HLNT October 19, 2004

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British Slang, Measurement of Time;

1) The unit of 'Yonk' is known to be exactly 3 Months and 13 Days.

--> Used to describe a long period since you last saw someone or something. Usually termed 'Yonks' rather than a 'Yonk'.
1)
BOB: "Gee Willy, I haven't seen you for Yonks!"
WILLY: "Yeah, must be about 3 Yonks actually."
by Stuart Fletcher November 10, 2004

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a long time
I went out with her for yonks
by dilbert scrunchie May 14, 2003

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a very long time, usually a number of years
"I've been mad for fucking years, absolutely years, been over the edge for yonks, been working me buns off for bands..."
-Pink Floyd, Dark Side of the Moon (Speak to Me)
by Chris August 25, 2005

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Many years. Ages.
I've been living in New York for yonks now
by Mark D Smith January 06, 2004

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a long period of time
I waited at the restaurant for him for yonks and yonks
by melissa May 25, 2003

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A long time - too long to contemplate!
The quote in Floyd is closer to this: 'I've been mad for fucking years, absolutely years, I've been over the edge for yonks; it's working with bands so long, I think - crikey!'
by AKJH November 23, 2007

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