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the act of sex between older persons and those specifically those who have suffered hip replacements or other movement difficulties. Tortoising can involve the use of a zimmer frame to create the shell in particularly active relationships.
My gran been tortoising her fuck buddy again he is in his 90s!
by gurgi July 13, 2009
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the act of emotionally withdrawing oneself from a situation, showing no emotions, avoiding emotions or feeling
He is always tortoising; I can't ever tell how he feels.
by Uwish U. Knewme May 11, 2010
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