Top Definition
The church which allows for worship in bed. Some people may or may not pick up on the sarcasm here...
Do you belong to a church in town?
Yes, I'm a loyal member of St. Mattress.
by Sun-day May 02, 2010
1 more definition
1 Word related to St. Mattress
worship from bed, usually very loud "OH GOD" repeated a lot
them: religious preference?
me: st.'s very exclusive!
by thatnoodlyappendage December 30, 2011

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