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1.
Slugging is the act of rubbing vaseline all over the front of your naked body, then sliding around like a slug on your kitchen floor (or any floor where it is possible to slide, tarmac is ill advised).
I heard that guy was caught Slugging by his father last night, what a pervert.
by Lil' Will October 30, 2012
 
2.
The act of vaginal penetration whilst inebriated and unable to sustain a full erection.

A stubborn attempt at sexual intercourse whilst physically unable to satisfy either party due to an excessive amount of alcohol consumed. Specifically resulting in a less than fully erect penis being forced uncomfortably into the intended recipient, 'like a slug'.
'man, i was with this steaming chick last night but i was so drunk i ended up slugging her.'

'this guy the other night was slugging me for about an hour before i made him stop, it was so disappointing'

'i don't really know what happened, i think we had sex but its more likely that i just slugged her.'
by drunksexisbad December 02, 2009
 
3.
The act of furiously cumming over a female after sex until they're a slimey and screaming.
I totally went slugging last night.
by The Bakertron February 08, 2014
 
4.
Similar to that of gulling, but rather the act is performed by a woman.
Person 1: 'Wow, she's giving that car a proper slugging'
Person 2: 'Yeah, look at the slug trails on that!'
by Drivebyabuser April 18, 2013
 
5.
The act of covering ones self in petroleum jelly and then proceeding to mimic a slug.
Guy 1: What are you doing this weekend?
Guy 2: My girlfriend and I were going to go slugging at the mall.
by Crypt of Lieberkuehn November 18, 2011
 
6.
Acting dumb; performing an activity slowly;
You won't be able to catch up to me if you keep slugging like that.
by TaShun Booher October 15, 2006
 
7.
To hold one's head at an unseemly angle so it appears in photo's that the person's head is a slug coming up from the neck of the body. While bounching on the balls of the feet and proclaiming you know what you are talking about, because of the establishment you work in. While emphasising you're over reliance on a few key words to accert your inner most desires to be loved. You may also be seen slugging while waiting for a comrade.
Person 1: I know what I'm talking about, this drink is the best ever. I work in a pub.

Person 2: Dude, stop slugging. You collect glasses
by Shock&Awe May 12, 2013