A four-way all-male gang bang in which the pivot person has an Aussie accent. At the end of the ordeal, the pivot man sips on a cup of tea while the others finish in his cup.
Hey dude, last night I engaged in a quadruplicity with some friends back home. Now my asshole is on fire as if it was smacked around by a Portuguese Man-of-War.
A quadrillion is a million, million, million, millions or 10^24 from quad for four, you see a quadbike does not have two and a half wheels, just as a tricycle does not have two wheels (...look up trillion).
A quadrillion dollars is a million, million, million, millions of dollars or $1, 000 000, 000 000, 000 000, 000 000.
A made-up term created by stupid Starbucks customers for a quadruple shot of espresso. They think that because a double shot is 'doppio' (which actually means double in Italian) that they can make up their own words for other numbers of shots.