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1.
a person that isn't your soulmate, but you have the tolerance to spend the rest of your life with and/or marry them.

also can be used if one doesn't believe in soulmates.
Friend: "You and Sarah have been dating for quite awhile."
Steve: "I've been considering asking her to marry me. I think she might be tolermate."

"Despite all his little quirks, I can't put up with him. He's my tolermate"
by A Magillacutty March 02, 2010