Replying to @daddy shortlegs good question!! A coinslot is

slot 1 a slot

What Is Slang for Slots? You may hear a number of different names for slot machines For example, the ones that can be found in traditional British pubs are

coin qq slot Filipino slang for Americans Shortened from Amerikano Merkin · Americans Slot Machine · Asian, their eyes look like coin slots AsianWhite Slur

coin combo slot coin slot: An small opening on a vending machine , arcade game machine, parking meter, etc to insert payment and operate the mechanism