An old-school system of telling people how far you've gone. While there are different versions this is how it
goes:

1st base- French kissing
2nd base- Feeling up, boob touching
2nd and a half base- Fingering, hand job
3rd base- Any form of oral
4th- Sex. All the way.

Can be summed up as french, feel, suck, fuck
According to the Base System, he figured that he had never hit more than 5 singles in his life.

Amy: "How far did you and Bob get last night?"
Lauren: "We only got to second. He just won't let me in his pants!"
by betterlivingthroughsarcasm October 24, 2009
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Objectives for a relationship
Also known as the four f's:
1) french
2) feel
3) finger
4) fuck
Friend 1: where you got to on the base system
Friend 2: I got to fourth base with ma gal last night
by :) cat lady April 16, 2015
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1st base holding hands, 2nd base kissing, 3rd base touching, 4th base, all out sex.
Dude I used the base system tonight and got a home run.
by the awsomeguy1467 January 23, 2015
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Similar to the regular base system but for more religious type people.

First base- hand to hand contact

Second base - A kiss on forehead, cheek, lips,etc.

Third base- any form of cuddling or spooning

Grand slam- after marriage the couple accumulates no less than 4 kids.
Jake was so nervous around his new girlfriend he had to start using the Mormon base system.
by G-unit 99 December 30, 2016
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1. Holding hands
2. Hugging
3. Kissing
4. Marriage
5. Hand stuff; feeling them up
6. Oral
7. Sex
8. Anal
"Ay yo Brad! How did it go with Kathy last night?"
"I got to 7th base"
"Fuck yeah dude. Love the base system."
by Alpacapoo March 18, 2020
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The American base system involves: first base - kissing and breast fondling; second base - manual stimulation of genitalia; third base - oral stimulation of genitalia; and home base (or fourth base) - the act of penetrative intercourse.

The Australian base system is slightly different: first base - vaginal sex; second base - anal sex; third base - threesome with two males and one female; home base (or fourth base) - threesome with two females and one male.
Elaine: All my friends back home go to home base by the time they're fifteen.

David: On the Australian base system or the American base system?
by aussieinthestates July 19, 2011
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