(n.) The approximate amount of time it takes for your mom to do something when she says "I'll be there in a minute"
General* conversion rate
1 mom minute= 15 normal minutes
*Please note that conversions vary. Moms may take up to 30 minutes or an hour after declaring their mom minute, and in those rare cases, they actually come in a minute.
Kid: "Hey Mom, can you come help me with my homework?"
Mom: "Yes, just a minute"
Kid: "Oh, ok, I guess that's a mom minute. I'll be back in 15 minutes, I'm gonna go watch some tv while I wait"