The ability of old men to molest women by performing actions that would get younger men thrown in jail. But because old men "don't know better" women find it funny, cute and flattering and embrace it openly - likely because they know the man molesting them doesn't have a functioning penis.
Grandpa was clearly utilizing his Old Man Immunity when he was hitting on the waitress and grabbed her ass in jest.
by WindBoner January 21, 2012
When your working outside and you gotta take a huge shit, but there is no bathroom in site. So you drop your pants, lean up against the nearest house and make it rain. When you are finished you find a garden hose and wash it off.
Hey Patrick, where you been? I had to take a massive dump and was running around trying to find a bathroom..I couldn't hold it any longer so I had to pull an Old Man Jerry (OMJ)
by Rosh507 December 14, 2014
Friend: its that guy again
Me: yeah thats just the local old man, he is just watching porn
Friend: your local old man is weird
Me: yeah thats just the local old man, he is just watching porn
Friend: your local old man is weird
by Lars Pedersen January 30, 2020
As you get older, you often find your ball sack hanging lower than in your younger years. When it gets long enough, you can attempt the old man hole-in-one. You tuck you soggy, stretched out beanbag between your legs and tuck it in to your asshole, all while stroking your engorged shaft.
That old fuck, Billy, hasn’t left his house in 3 days. I bet he’s in there giving himself the old man hole-in-one.
by Kung fu Jim September 26, 2020
by Big bicho April 20, 2023
The method used by old (and sometimes young) men when preparing to eat a handful of nuts. First fill the palm of the hand with nuts, lightly close the hand, and shuffle back and forth before bringing the hand up to drop a few perfectly positioned nuts in the mouth. Technique can be applied to any small loose snack or candy. The shuffle motion is comparable to that used when shaking dice for gaming.
Can you believe Uncle Frank ate a whole 1 pound bag of trail mix??!! His wrist must’ve been sore from all of the old man nut shuffle action.
by ##thatswhatmomsaid April 09, 2023
by Cameron Banzoowalktoomanshebitchfacetronthon January 21, 2004