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In the context of drugs, "to lace" (cut/fake) means adding a secondary substance to a product without the user's knowledge.

Often, this is done to increase the weight (and therefore the profit) or to make the product more potent/addictive.
"I'm a drug dealer and I'm going to lace it these MDMA pills with caffeine to increase my profits."
Lace it by Inkkoo March 22, 2026

lace it up 

to go do something, stated enthusiastically.
George: "hey, you wanna go check out that new burger joint?"

Mark: "ayo, lace it up man"
lace it up by m3gaman May 25, 2010

Lace it up 

Originally created by Mark and Will in 2007. It's a phrase used to instruct someone to prepare drinks for everyone at a party or privately between 2 people.
Gee: Yo, do you guys want a shot?
Justin: yea, lace it up for everyone!