2. Chemistry - Any substance with a pH greater than 7. Also considered any substance that can act as a proton receiver.
3. Objects in baseball that batters run to when they hit the ball.
2. KOh (Potassium Hydroxide) is a strong base.
3. Alex Rodriguez hit a home run but forgot to touch 3rd base.
2nd base - poke or handy
3rd base - lick out or blowing
4th base - All the way
After getting drunk on the Saturday, we went back to Georgia's because her parents were out. We called in Jack and Rory, they came running. Once they arrived Georgia and Jack went through to her room, they were humping so hard the bed was hitting against the wall and Rory and I could hear it in the next room. He poked me whilst sitting on Georgia's sofa, then Jack and her came through and it was me and Rory's turn. We went through and he fucked me so hard my pussy is still hurting, we came back through to the lounge and Georgia and Jack were having sex, so me and Rory joined in and we had the best foursome ever, Rory licked me out, I licked out Georgia and Jack analed me and georgia gave jack a blow job. I think we can all agree that was the best night of our lives...
2nd - Finger, Hand Job
3rd - Oral, fellatio (blow job), cunnilingus(eating out)
Home Run - Sex
*Titties are irrelevant*
Other Guy: Hopefully you'll score a homerun tonight!
Dude: I'll probably round all the bases with her tonight!
-OMG did you get to see his... well you know.
- EWW NO!
1st Base - Frenching
2nd Base - Feeling and/or Hand Jobs and/or Fingering
3rd Base - Oral and/or Anal sex
Home run - Sex
Another version I've heard is the four Fs described in another definition, and also a kind of silly one that had sex at third, 2nd at anything other than sex, 1st at kissing, and home run as getting married.