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1.
1.(noun): One who often says the wrong thing.

2.(adjective): A moment one may have when they say something akward/inappropriate.
1. Bill is such a foot mouth; he told Sally to "tough it out" when her boyfriend broke up with her.

2. Bill had a foot mouth moment yesterday when he asked his algebra teacher for a lap dance.
by rebecca</3 April 21, 2007
 
2.
When someone;enigma;etc. says something ridiculous and then regrets it. You can accuse them of being a 'footmouth'.
"Yo bro, why you gotta' be such a footmouth all the time?!"
"Man, sorry, just do that hustlin' all the time..."
...
"Footmouth..."
by .Enigma.Of.Anonymous. October 31, 2012
 
3.
to unwillingly insert as much of your foot into your partners mouth during hot booty sex
Craig, get you smelly, cheesy, son of a bitch of a foot out of my mouth mumbles natalie with a mouth full of foot
by craig June 23, 2004