(n,v) To rely on pumping inertia to stay hard after ejaculation. This is to allow for a partner to climax if they have not, or to achieve multiple orgasms.
"Dude last night I blew before your mom, so I let her ride the buttercoaster for a while."
"I had to buttercoaster that chick for an hour before she finished."
"Buttercoastered!"
"I had to buttercoaster that chick for an hour before she finished."
"Buttercoastered!"
by TrickyBillyNumber5 December 3, 2005
Get the buttercoastermug.