1. a female who is sexually and emotionally attracted to other females but occasionally hooks up with males

2. a woman who considers herself to be a lesbian but hooks up with men on occasion

3. a lesbian who is sexually flexible
person 1: "I knocked on Ashley's door, but she wasn't home"
person 2: " Oh, yea she spent the night at Mark's"
person 1: "I thought Ashley was a lesbian"
person 2: "She is. Well kinda. She's a protean lesbian"
by sheezy402 December 20, 2011
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A guys cum. Cum is suppose to be made of protean, so it is a joke, relateing to a mileshake made out of cum.
A girl gave her boyfriend oral sex, when he came in her mouth, she drank a protean shake.
by Tim Fackler March 20, 2007
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A guys cum. Cum is suppose to be made of protean, so it is a joke, relateing to a mileshake made out of cum.
A girl gave her boyfriend oral sex, when he came in her mouth, she drank a protean shake.
by Tim Fackler March 20, 2007
Get the protean shake mug.
someone/something that have the ability to adapt very quick to all situation in different aspect.
He's a protean person, because he adapts very quick at his new job.
by TFB sthetic October 12, 2023
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