A dog that is small enough to be stepped on accidentally to make a sound afterwards.
Chihuahuas, Yorkshire Terriers, and Miniature Pinschers are foot horns.
by thisguyrightthere September 23, 2011
1 more definition
Part Foot part Horn - normally a side effect of zebra farming
Shit that guys got a Foothorn
by Azap March 12, 2008