second base
noun
1
in a teenage categorisation of sexual activity, a level of foreplay, most usually referring to touching a girl's breasts. The exact degree varies by region or even school US, 1977.
2
in casino games of blackjack, the seat or player in the centre of the table directly across from the dealer US, 1980.
3
in a deck of playing cards, the card second from the bottom of the deck US, 1988