When a breastfeeding woman's breasts are bothering her as in being sore or uncomfortable in any way due to milk production.
My wife's left breast has been sore and not producing enough milk for baby these last few days. I wish it would stop lacting up so that I don't have to hear her whine anymore.
by Apexkilla December 23, 2010
Get the lacting up mug.Verb. Lacing up is a prison term meaning that an inmate is putting on his shoes to prepare for a fight.
Inmate: Look at him. He isn't scared at all. He's lacing up right now. Get ready. Shit's about to go down.
by Gohan Barracuda March 3, 2019
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Staying the night at an attractive young lady's house (who happens to have the IQ of a goldfish, and is dating you). Then, breaking up with her the next morning, after a night full of sticky fingers, and play. Oh, and of course, board games. And Twister. And of course, youth group the next morning. And baking cookies. And lying on the couch. And we cant forget all of her friends coming over. And lastly, her orgasming so hard that her newly died, stapled in hair flies out.
by Us People June 11, 2006
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