siefer 

"Siefer" is a type of malware, usually found on MacBook Pro.
It slows down internet connections and writes its own name on websites.

Creepy weirdo.

Shit, I just got a Siefer on my Mac.

siefer by WebmasterProfessional3000 November 13, 2014

Siefer Math 

The math used to determine whether or not Outbound is up or down on cases.

Utilizing Siefer Math, Outbound cases are up 1,738 even though carton length was 25-inches with Scotts on three lines and big Sterilite on the other with tile and four-foot Philips coming through CCS.

Siefer Math by LLD-NLD-4419 June 22, 2018

Seefer 

Gross shit caused by caffeinated drinks.

My roommate just got back from Dunkin and went straight to the bathroom. He’s probably dropping a seefer right now.

Seefer by Ballofcost November 30, 2018

siebers 

very caring funny smart and a good last name for anybody. Siebers is a name that famous people have. and they love ice cream and softball and crowder thats also a famous name.

i love them siebers and crowders!!!!!!

siebers by mosiebs July 24, 2011

Simferg 

A boy usually of the lighter brown complexion. He has a way about himself that is just amazing. Usually ones best friend and extremely easy to talk to. An instant chick magnet, and has a massive penis.

Damn. When i grow up i wanna be a Simferg!

Simferg by IcySavageFrm443 April 3, 2017

Spefert 

Sean's form of the word "perfect" when hes had too much beer and wine.

Sean's Mom - "Hey honey. How was Timmy's birthday party?"

Sean - "It was Spefert, maaaaan."

Sean's Mom - "What did you say?"

Sean - "It was Speferrrrrrt."

Sean's Mom - "You're fucked now, bitch. Bend over."

Sean - "Oh. Spefert"

Spefert by DylanIsATallRetard August 7, 2009

seferina

Damn you funny as Fuck dude they may be shy at first but once there out of their shell they are CRAZY!

Hey seferina you a bad bitch

seferina by Ahshdk3bhwhajebwvwgw November 13, 2020