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Covering one's penis with peanut butter prior to penetration.
Yea, we wanted to mix things up a bit last night so I Jiffed inside her.
Jiffed by Claufhouse June 12, 2011
Related Words
to fart, or beef, in a juicy manner...especially when a stench is prevalent.
I jiffed in the movie theater, and it made the projectionist's eyes water.
jiffed by The Real JBT June 1, 2011

Jiffed up 

The act of going from being thin and smooth to being chunky and fat like JIF peanut butter.
That girl used to be skinny, but now she's all jiffed up.
Jiffed up by Dzynz October 7, 2008
To consume a large amount of alcohol; another word for being drunk
Lets go to the bar and get jifted tonight!
Jifted by bobsky123 January 25, 2012
The Linux kernel maintains a global variable called jiffies, which represents the number of timer ticks since the machine started. This variable is initialized to zero and increments each timer interrupt.
The jiffies global and associated functions are provided in ./linux/include/linux/jiffies.h.

asmlinkage long sys_getjiffies( void )
{

return (long)get_jiffies_64();
}
do you know your jiffer ?
jiffer by ackit June 1, 2010
Jaffed can literally replace any word you want.
I jaffed Johnny a fiver. I jaffed all over her. After that spliff I was so jaffed. That strike was a fucking jaffer by Robbie on Sunday.
Jaffed by YungMilo January 23, 2017