get brain
v.— «Kids say “get brain” does not mean smarts. It’s slang for oral sex.» —“Bus ban on sex ads” N.Y. Daily News Nov. 5, 2004. (source: Double-Tongued Dictionary)
Further reading
An anadrome is a word that forms a whole new word when you spell it backwards. For example, the word “stressed” spelled backwards is “desserts.” Some people’s first names are anadromes. There’s the girl named Noel...
A flashlight doesn’t flash. It provides a steady beam of light. So why is it called a flashlight? The earliest versions lit up only briefly before the batteries gave out and required a recharge, so they were literally “flash lights...