Well, "Let us give thanks and praise to the Lord" is:

Gratias et laudam agamus Dominum

and that we could say something like:

pro fundamentum splendidum Diedrei.

(Diedrei is pronounced Dee-DRAY-eeee). I'm sure that's not right, but it's close enough to fool most anybody. Can't say I learned the word for the anatomical bottom in seminary Latin class....
Maybe "fundamentum" would mean closer to "foundation garments."

-Joe Offer-


Oh, and "gaudeamus" means "let us rejoice," as Gargoyle indicated.