(v) To have sexual intercourse. The knock refers to the man's hips hitting the woman's ass, which produces a slapping sound. The motion literally knocks her boots (buttocks).
"Bring your friend, I likes you two's I'll knock the boots, the sneakers and the house shoes." - Digital Underground (Flowing on the D-line)
dari Stoic Seraph Senin, 14 April 2003
Knockin' boots is an old western term for having sex. Derived from both he and she stripping down and slipping their boots under the bed which sometimes made a "knocking" noise. Sometimes the boots are/were left on during sex and the boots would knock during all the action.
I think I got drip dick from knocking boots with that hussie Ellie May.
dari Bill Dailey Jum'at, 22 September 2006