Uff da
From LGPedia
Uff da is an exclamation of Norwegian origin that is relatively common in the Upper Midwestern states of the United States, meaning roughly "drats," "oops!" or "ouch!" especially if the "ouch!" is an empathetic one.
The the first known use of 'uff da' on the forum was made by Chelseyrl on Wed Mar 21, 2007 8:15 pm.
Since then Uff Da has gained great popularity in the LG15-Community.