A pre-chorus part of the 2013 Imagine Dragons song "Demons". In 2021, it gained popularity in memes as a joke about semen, being paired with videos of various white liquids being sprayed or spilled.
Often paired with Gaviscon firefighters spraying thicc white liquid, which is the kingdom of "coom".
A phrase expressing a strong desire or need for somethingrelatively simple or inexpensive as compared to a kingdom, but at the present moment the item needed or wanted is invaluable. Any needed item can be substituted for 'a horse.'
"My kingdom for a horse."
"My kingdom for a BLANK."
"My kingdom for a roll of TP." (expressed while sitting in a bathroom stall without toilet paper.
"My kingdom for a gallon of gas."
"My kingdom for a bra that fits."