A sexualized version of "in for a penny, in for a pound." Means almost the same thing as the original saying but in a sexual context as aforementioned. In context, it references sex with or without protection (in this case, without), and since it was done before might as well double down and do it again regardless of the consequences.
This was used in Team Four Star's, Dragon Ball Z Abridged: Episode 60 Epilogue.
Bulma: "But after the first time, I just thought; well, in for a penny, in for a pounding."
Trunks: "Ahhh!"
Bulma: "And I really was."
Trunks: "AHHHHHHHHHHHHHH!"
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.