Acronym for "Spontaneous Display of Affection" Can occur in person (hugs, kisses, etc.), Over the phone ("i love you"), over email or IM (emoticons, typing).
SDAs generally occur after
long silences. It is not considered an SDA if it is brought about by any
action of the
two (or possibly more) parties.
<Jack and
Jill are silently walking>
Jill: (out of the blue) I LOVE YOU I LOVE YOU I LOVE YOU! (hugs and kisses Jack)
Jack: Boy, it seems i am at the business end of a
serious SDA!