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the process in which the vagina in stimulation produces its own lubricant(or marinade) and begins a pull on the shaft of the penis...

some say scientifically this is a reaction to pull semen closer to the uterus......

also the constriction of the vaginal walls mimicing a swallowing sensation
Nic watched as i nailed that chick so hard she got all bothered and caused an upsuck so hard on my schlong.....it pulled all the skin up to the head of my dick to where i didnt have enough skin left to close my eyes.

The upsuck of that chicks ass was like someone drinking out of a garden hose in the summer.
upsuck by jere from smackjab April 19, 2008
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upfuckery 

Activity or activities leading to the fucking up of something or someone.
"As usual. upfuckery abounds in my family"

"What sort of upfuckery is this?"
upfuckery by Mu Cow January 29, 2008
Related Words

Windows Upfuckingdate 

When the Windows Update is very slow, for example when a security update of 1.8 MB is downloading in one hour.
John: What's going on Jim? Why are you looking at the computer so long?
Jim: I'w waiting for the Windows Upfuckingdate to complete.
A poker term invented by @PhilLaak in 2015 to describe being down on money from your highest value while gambling.
If you were up $8,000 and now you are only up $6,000, then you are 'upstuck' $2,000 even if you only entered the game with $4,000. This creates obvious psychological effects to how people play while gambling despite their actual buy in.
upstuck by MoonKil September 15, 2015
The tucking of a boner towards the top of your pants
I got a boner in class so I got the uptuck going
uptuck by tucker June 18, 2005
Removing the suckiness from your life.
Let's unsuckify work by drinking on the job!
unsuckify by Colleen Myers July 8, 2005

Unsuckable 

uhn-suh-ka-bol, adj.

Literal translation of the Spanish slang word inmamable, used to describe someone (or something) that cannot be tolerated.
Tina: I can't stand Sebastiana anymore!
Edward: Si, esa tipa es unsuckable
Unsuckable by Spanglish Peeps April 16, 2014