look up any word, like blumpkin:
 
1.
Really bad orthodonture (crooked teeth).

synononyms: British teeth, Mouth of Horrors.
She was a babe until she opened her mouth and showed me her picket fence.
by Nancy_Drew_Mysterious October 04, 2006
 
2.
A sexual fivesome, similar to a London Bridge (two dudes tappin two chicks doggystyle while those hos makeout) with the addition of a third man between the women, who simultaneously receives a blowjob and assplay.
shit dude i was middle post in a picket fence one time and hoo boy we were high fivin all UP IN that bitch
by the most mythical of reindeer January 09, 2007