Spirit leveling 

When you fart and a bubble feels like it moving up and down your are crack

I just farted and now it's spirit leveling

Spirit leveling by Stan Stanley stanforth May 3, 2019

Leveling up 

Getting even with your friends in terms of the blood alcohol level.

Example:
After some hours of working overtime, you get to your friends on a party. They already had several drinks and thanks to their blood alcohol level, they're having a lot of fun, while you're still sober and therefore not in the same mood as them. To change that, you've got to level your own blood alcohol concentration up.

If people eventually stare at you because you drink a lot in a very short amount of time, you are allowed to excuse this by saying: "It's alright. I'm just leveling up right now."

Leveling up by Boki Cristi October 12, 2014

levelling up 

To practice something regularly and get better and better at it

Person 1: "how are the guitar lessons coming along?"

Person 2: "yeah i'm levelling up, i can play guns n roses welcome to the jungle now!"

levelling up by megatr0n187 June 8, 2011

leveling 

Doing a task repetitavely in a video game or in real life in order to gain experience in whatever is being done. Often done for hours on end. Otherwise known as "practice".

Man I didn't get any sleep last night I was too busy leveling scales on my guitar.
Yeah, that's going to be useful when you fail your history test.

leveling by level up May 17, 2011

Zombie Leveling System

The Zombie Leveling System (ZLS for the sake of this article) is an ingenius method of rating zombies and their abilities. To the masterful eye of a zombie conisseur, any zombie can be instantly rated. The further a zombie has decayed, the higher it's level is. However, the decay level of a zombie eventually reaches a peak, in which its abilities are taken into account. The ZLS has taken into account several zombie abilties. Low level zombies merely have the ability to eat you and stumble around, should you be dumb enough to run into them. However, as zombies get higher in level, they become more agile, and gain abilities like spontaneous combustion, spikes, and wings. A level 50 zombie, is the most feared. Despite how rotten his flesh is his decayed brain can merely think about you, and you will die.

The rotten flesh zombie on fire, is about a level 20 on the Zombie Leveling System.

Zombie Leveling System by Terry Holloway July 12, 2006

cultural levelling 

When two distinct cultures become increasingly similar to one another.

Mom-and-pop stores that once existed in small towns have been driven out by chain stores like Wal-Marts all over the country, thus causing cultural levelling and a loss of uniqueness and diversity in the town itself and in the country.

cultural levelling by KittenKat93 March 15, 2014

grind-leveling 

When playing a video game, you stay in one area and level up, even if you're more than strong enough to move on.

I was playing Kingdom Heart and grind-leveling in Traverse Town.

grind-leveling by ElectroNerd January 3, 2014