What is 13th Base?
1.
Sex with your boss, professor, or another person you have no business fooling around with . . .
"I did not have sexual relations with that woman . . . it was just 13th base!" -- Bill Clinton
See
2.
What You Get For Having Sex With Erin Gaskin.
(i.e (male) when you have intercourse with a female and you end up getting warts, aids, and every other STD you can think of. )
Dude, I went to 13th base with Erin last night; my funeral is tuesday.
See
3.
(male) when you have intercourse with a female and you end up getting warts, aids, and every other STd you can think of.
Man this girl took me to 13th base and now my life is over!
See