look up any word, like trill:
 
1.
When a group decides they are going out HARD for a night of drinking they are said to be, "getting after it"
Dude, I've made an executive decision. It's been a long week and we ARE getting after it tonight.
by Andrew1122 February 26, 2008
 
2.
taking it to the max, abusing substances to the point of annihilation, 6/24/10
Wow, we were definitly getting after it last night. I woke up in a field wearing only a burger king crown.
by Big B 143 June 25, 2010
 
3.
To drink alcohol and get shitfaced.
Rick: Yo what are you doing tonight?
Bmurph: We're going to the bar and getting after it.
by Slick Ricky September 15, 2006