"I Drink Your Milkshake"

Eli is a manipulative preacher who is trying to get money from Daniel, an oil man, by selling the oil rights of one of his deceased members of his congregation.

After humiliating Eli, Daniel reveals that he doesn't even need the land to get the oil because of drainage.

The Bandy pact (the deceased congregation member's land) sits on an ocean of oil; however, Daniel has already drilled around the Bandy pact and is taking the oil out from underneath it.

Daniel compares the concept of drainage to sticking a long straw into someone elses milkshake and drinking it up.

According to Wikipedia, "I drink your milkshake" is paraphrased from a quote by New Mexico Senator Albert Fall. He compared the term "milkshake" with the process of oil draining while speaking to senators before a Congressional investigation into the 1920s oil-related Teapot Dome scandal.

Thanks probably entirely to the performance of Daniel Day-Lewis, it is now used as slang when bragging. If you beat your friend really bad at a video game, let out a good "I drink your milkshake" (though good luck sounding anywhere near as cool as Daniel Plainview).

Perhaps another reason the expression is taking off is because it compliments the popular 2003 song "Milkshake" by Kelis.

Or hey, maybe people just love to drink milkshakes!

Whether you think it's cool or it's stupid, "I drink your milkshake" is everywhere. There are now t-shirts, comedy skits, and websites based around the saying.