Blood Transfusion 

The act of having sex with a woman on her period, not taking a shower and then having sex with a different woman.

Dude, I was hitting my girlfriend even though she was on her rag when her husband busted in the door before I could nut so I went to my other ho's crib and gave her a blood transfusion.

Blood Transfusion by Obvy January 7, 2010

Mexican blood transfusion 

A 2 or 3 liter bottle of red soda, usually purchased at the grocery store on the way home from work, that when completely consumed, invigorates and rejuvenates the consumer.

After a hard day shingling roofs, Juan came home and had a Mexican blood transfusion while watching novellas , and felt so refreshed and energetic that he helped his brother in law paint all the tree trunks in the yard white.

Mexican blood transfusion by Mr. Stockcar May 25, 2016