Cross the Rubicum

(Of a male) The act of not pulling out of a female's vagina when about to ejaculate; made worse by the non-usage of a condom.

This phrase is the opposite of the popular "Pull out before it feels good", and instead means to go past the point of no return (i.e. a creampie)

This may further result in pregnancy or a bag baby.

I was getting it in with my girl this weekend, when I decided to cross the rubicum. If she wasn't on the pill, I'd be a father for sure.

I accidentally crossed the rubicum with my friend's sister the other day. Thank goodness for Plan B!

by GerYard April 10, 2014

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Blue cross

Private hospital insurance.

That is one nasty wound.I hope your blue cross isn't payed up.

by BlackPohatu October 07, 2016

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Cross Pollenation

A common hazard of MMF-threesomes. One man accidentally ejaculates on the other man. Can also occur through "sloppy seconds" experiences(oral, vaginal and anal).

"Matt dude, was there any cross pollenation on your trip to Paris(Eiffel Tower) with Molly and Dan??"

by SACK ROWE January 04, 2008

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Crossing Sheaths

The act of "accidentally" rubbing your vagina up against another womans's vagina.

"Sure, I'll move in with you guys! But under one condition, You, me and Robert can have a threesone. Unless you're not comfortable with the act of crossing sheaths.. >;."

by lolwutRon January 06, 2009

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Cross-pollinated

The act of having unprotected sex with one partner and then, without showering, having unprotected sex with a different partner, thus transferring the residue, juices, and secretions between the two parties either with or without their knowledge.

Gentleman 1: "Last night I had sex with Amber and this morning I had sex with Brittany. I didn't take a shower in between."

Gentleman 2: "It seems as though you've cross-pollinated...well done!"

by XxdynoxX July 06, 2015

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