Fourth Base 

When you refer to your other intimate moments with your partner as first, second or third base, yet you have forgotten that the next step is referred to as a "home run", and is not called "fourth base". Yes, fourth base is sex, but come on! Just call it a home run! All the other bases are used in a reference to the bases is baseball. Have you ever played baseball? There's no fourth base!

"Dude, I totally got to fourth base with my girlfriend last night"

"You mean a 'home run'?"
"Yeah, either way we totally smashed".

Fourth Base by slurpeesaredelicous January 8, 2017

fourth base 

The final stage in a relationship that involves sexual intercourse.

First Base -- Making Out (tongue included)
Second Base -- Rubbing, Dry Humping, grinding.
Third Base -- Oral Sex
Fourth Base -- Sex

"I can't believe it, he got to fourth base on his first date with her!"

fourth base by Cloud Infinity December 24, 2006

Fourth Base 

This is the final step in a relationship that involves having sex.

Me and Jace hit fourth base last night, oh boy was I ready for that.

Fourth Base by NekoNeoNano July 7, 2015

Fourth Base 

Means your home or your primary place of residence. The term is derived from Baseball where the Fourth Base in a diamond is called the 'Home Plate'...

"Ayo, holla at me, I'm at my fourth base dog"

Fourth Base by AdoubleR November 4, 2008

fourth base 

see home base

"he tried to get to 4th base with me.."

fourth base by etchasketch October 21, 2003

fourth base 

Anal

first base: kissing/grinding
second base: blowjob
third base: sex
fourth base: anal

fourth base by xkeymastrx January 29, 2017

fourth base 

After 3ed base is when you add animals in your sexual activity.

"Jan and John throw butter and smokey in there titty fucking asshole pleasures when they got to fourth bases."

fourth base by dickinyourmouth January 22, 2009