fifth base

When you get past fourth base on a chick, (or on a guy if your queer). This is when you place your meat in her ass. Commonley refered to as Puerto Rican style.
Hey TJ, I fith based this chick on saturday night, Puerto Rican style. I pulled out and there was a peice of corn on my helmut.
by Kelly June 03, 2003
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stin base

The act of nailing a fat ugly female than tying her to the bed and ripping a huge fart on her face and when she throws up u push her face into it and tell her to eat it.

Or for a fat desperate man receiving, it is when a women mounts him opens up her vagital lips around his nose and queefing til the man throws up in her butthole. and to top it all off for a little taste the girl craps the vomit and poo back into the mans mouth
that girl took that stin base like a champ." "so i hear you like stin base's that true?" "hey boss cant come to work today, still sick from that stin base session we had the other night, how you holding up?" "stin base's are my specialty in the bedroom
by ticklemygoochtiligiggle December 22, 2010
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666th base

Sex with the devil.
In hell.
Guy 1: Hey guys, guess what I did last night!
Guy 2: What?!
Guy 3: I heard he got to 666th base.
Guy 1: It was totally satanic.
by The Devil Himself, Bitch October 22, 2006
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50th base

Having sex to the point where you are so sore you can't move, then forcing yourself on top of your partner and bouncing up and down.
1st guy: "Dude I got to 50th base last night"
2nd guy: "I thought I heard you two screaming, but I had no idea."
1st guy: "Yeah I can't feel my junk now."
by Newlemming August 30, 2008
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second base

highly debated base when talking about sexual accomplishments, all that needs to be done is to clarify what "league" youre "playing" in.

second base in minor league baseball is feeling a girl up.

second base in *major* league baseball is fingering or handjob.

Major league- 1st base makeout with feeling up; 2nd handjob/fingering; 3rd blowjob/ eating out; home sex

minors- 1st base makeout; 2nd feeling up (breasts); 3rd oral/fingering/handjob; home sex

"oh my god becky, last night, james and i went to second base!"
"major or minor league?"
"major baby!"
"oh wowww"
by gabiegh December 28, 2007
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129th Base

Tom: wait, how do you even get to 129th base?
Bill: the easiest way is to fuck Schrödinger's Cat
by mmm.grapes December 26, 2009
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7th Base

7th Base of sex: Open flesh wound...
(After 6th Base - Anal sex)
Got all the way to 7th base last night! Nearly passed out!!
by HellishDolphinRevenge November 12, 2012
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