Top Definition
A letter held by that will only be delivered once a certian event has taken place, such as a death, birthday, marriage or whatever other trigger that the sender mandates.
Example 1:
One year after Hugo's death, I recieved a "trigger letter" from him telling me what a ______ I am? Insert your favorite insult or compliment in the blank, depending of course how Hugo felt about you....
Example 2: Susan always had to get the last word, but I sent her a "trigger letter" which will give her a grave suprise.
by sleeping grinch February 09, 2010
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