yermometer 

A device for measuring the hotness (or notness) of yer mom.

My yermometer is reading 90 degrees!

yermometer by Djaxn March 27, 2013

Yeetometer

The level of yeetness on a scale of not very yeet to very yeet.

Scale:
Not very yeet. A bit yeet. Quite yeet. Very yeet.

That seems to be quite yeet.

Put it on the yeetometer.

Yeetometer by IAC DBA December 12, 2019

Yourmometer 

A qualitative measurement tool to characterize the hotness of someone's mom.

1: Dude, your mom is hot.

2: Shut up. You're sick.

1: I can't help it. She's got a high reading on the yourmometer.

Yourmometer by Evan L. June 5, 2007