When you go to a car dealership, with a ton of unsupervised and unlocked cars... (Specifically Reedman Auto World) and have lots of crazy sex in said unlocked cars.
I stopped at a car dealership today with my girlfriend and pulled the reedman when the sales person walked away...
or
Hey man, I pulled the reedman today... What do you mean? I mean i fucked your mom in a Tahoe when she took me car shopping.
It's a name that is combined of 3 words, ree which represents the name Reem, di which represents the word that's, har is a short name for Harry styles. So that name represents the sentence "reem that's obsessed with Harry styles"