McSniff 

Name given to one with the last name 'McNiff'

Guy: TAYlOR MCSNIFF!

Taylor: Stop calling me that!

McSniff by McSnivellus February 19, 2011

McNifficent

When a person with Ginger (Champagne beige) hair does something particularly magnificent.

The cross came in and Ali hit it on the volley and scored a McNifficent goal!

McNifficent by Pam Burplen March 7, 2014

Mcstiffy 

When ya have a hard on in the maccies drive through

"shit this maccies breakfast is giving me a mcstiffy

Mcstiffy by Liz bones October 16, 2018

mcniff 

A true veteran in one's sport; usually in open competition. Typically part of the sport/game for thousands of hours and commonly referred to as an "open veteran".

Man, that player has been in competition for a long time. He is a true mcniff of the game.

mcniff by thisisthedoctorspeaking February 11, 2020

McSpiff 

A form of digital-anal intercourse between men, where a finger is inserted deep enough in the rectum to put pressure on the prostate as an accompaniment to oral or manual sex.

Also sometimes called a "spiff" or a "McSpiffy."

He didn't seem to like the blowjob until I gave him a McSpiff. Now I remember to spiff him every time.

McSpiff by tannerstages August 3, 2010

Mcniff 

a weak male who is bad at video games, particularly csgo, pubg, fortnite, along with any other game.

hey, that dude is so bad at everything, he must be a mcniff!

Mcniff by whatasexiboi96 May 16, 2018

McNiff 

Somebody who is a gimp.

Man 1: OMG he has a high ankle sprain!! Man 2: HEY YOU GIMP(McNiff) YOU SUCK!!!!!!!!!!

McNiff by GimpHater January 8, 2011