a full sprint while swimming over large distances. Named for the build up of lactic acid in your muscles. Will, quote, "make your penis hurt"
by sean smith December 15, 2012

When someone has a dry t-shirt except for two wet spots right at the breasts.
i.e. Would you look at that, Tom is starting to lactate.
i.e. Jesus Christ it's hot out here, I'm lactating already.
i.e. Would you look at that, Tom is starting to lactate.
i.e. Jesus Christ it's hot out here, I'm lactating already.
by ILIR September 9, 2008

by Asstittyballz December 7, 2015

At first we didn't know what was wrong with Linda, but we soon found out she was a Lactating Savage.
by Viking Guy May 15, 2007

one who interjects randomly, interrupting someone in a conversation, like a cow who is full of milk and lactates spontaneously.
Thomas: Bro. you won't believe what happened to me last night, I was driving home and....
Gilbert: Yo you wanna hear a dead baby joke.
Thomas: Stfu and let me talk don't be a fucking lactating cow.
Gilbert: Yo you wanna hear a dead baby joke.
Thomas: Stfu and let me talk don't be a fucking lactating cow.
by D3RTYS4NCH3Z August 27, 2008

We took it personally.
Lactation Lettuce was denied on Urban Dictionary, and we, lactationlettucelickinglover420, will not stand to let it be denied a second time!!!!
by Lactationlettucelovinlicker420 February 8, 2019
