The act of resting/sleeping cocooned under the covers after a long session, in the style of Mother Teresa resting in her death bed (see CelebrityMorgue.com). This session could be after exercise/shagging/drinking. A mother teresa can last anything between two minutes and a day. It is most commonly used in dire situations, such as betweeen finishing a session and having a shower or eating.
M dot T always comes first.
1. Jack: 'Ahh man I had such a long shag last night, i'm in need of a serious M dot T'
2. Adam: 'I've only got two minutes until school, time for a mother teresa me thinks, otherwise those bitches are gonaa be on my back all day...'
2.Jack C: Man Jack B, all you do is Mother Teresa all day long, why are you so tired all day long?!'
JackB: It's because of all those Troff times i've been having.