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a craftey ol man who is allways getting in to trouble every time he thinks he has it made bang! hes cought by the meddling kids and there dog.
someone allways trying to get away with somthing ex.; look bobbys pulling a old man jenkins on his folks again.
by karl f gorham October 07, 2003
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
Similar to Mr. Wilson of the popular Dennis The Menace series, though with a hint of Mr. Magoo. Grumpy and bumbling, usually always gets his "come-uppens'"
Old Man Jenkins was chasing after the neighbor's bratty 7 year old kid but slipped on a banana peel just as he was about to grab the kid.
by K. Aman March 16, 2005
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3
A fart emitted from an elderly man/woman unbeknown to them. A fart that just "falls" from their butt sounding similar to a horse snort.
Man did you hear Mr. Jones's Old Man Jenkins?

Yeah I heard it, but he definitely didn't
by frixibeltyler August 31, 2010
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4
A loyal customer of the Krusty Krab who's out-lived time itself and he's lived in Bikini Bottom for as long as he can remember...
Spongebob: Hi sir, welcome to the Krusty Krab! May I take your order sir?
Old man Jenkins: Uh yes, uh... um... Yes, I'll have a- *dentures fall out* Oh whoopsie heheh, my dentures fell out...
Spongebob: Would you like me to get that for you sir?
via giphy
by Edgy Cunt #1290219 January 17, 2018
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6
an old guy that has been there all the time

wierd
There is old man jenkins with his jelope
via giphy
by cool kid03 February 11, 2016
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