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An extremely good blow job.
Cathy used those great DSL'S to give me a "knee buckler" last night.
by Eman3737 November 29, 2004
8 6
An intense orgasm
"I didn't fap or have sex for two whole weeks. When I finally came, it was a knee-buckler!"
by Michael Michael Motorcycle July 31, 2013
0 0