sixer

noun

1. (colloquial)A shot in which the ball passes over the boundary without touching the ground, for which the batting team is awarded six runs.
2. A Cub Scout or Brownie who leads a group of six.

   “Many packs have a sixer's council where the sixers, and sometimes the seconds, meet with Akela and some of the other leaders.”

3. (slang)A prison sentence of six months.

   “1869, A Merchant. Editor: Frank Henderson, Six Years in the Prisons of England The copper knew I did that job, and had me up on suspicion some time after, and gave me a drag (three months) over it. The next bit I did was a 'sixer' (six months), and I escaped from prison in about three weeks after I got it.”

4. (slang)A six-pack of a beverage.

   “Well, I'll let you get back to work. I'll swing by later on with a sixer of Melonade!”

5. (UK)A conker that has won six matches.

   “The history of 'oners' becoming 'sixers' through successive victories[…]”

6. (India)A transgender person
7. (informal)A player for the 76ers, a team from Philadelphia.