A 'Ledge' is a person you wish to bestow a certain amount of grattitude on for doing a ledgendary act. This act may not seem like much but if it touches your heart (for whatever twisted reason) let them know today. Give 'ledge' a whirl.
Mr formestone you are a Ledge.
(also note that contorting your right hand to form an 'L' shape and firing it up in a rather 'Craig David' style way adds extra oomph to this phrase. The double ledge (wherein you make two 'L' shapes) is becoming ever popular also)