Beetleing is a colloquial term which is used when reffering to sex. Most commonly used when one reffers to a quickie!
Rory - "See that elaine - she'd get a right beetleing!!"
John - "Nah the only one who would get a beetleing is that Jill!"
Alexander - "You guys got it all wrong, Lynne would get a beetleing"
Peter - "What about me???"