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.
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.