Mavity

What the 14th Doctor and Donna from Doctor Who accidentally influenced Isaac Newton to call gravity, through Isaac mishearing "the gravity of this situation".

This then goes on to be a running joke past the opening for Wild Blue Yonder (2023), e.g. in The Church on Ruby Road (Christmas special 2023).

Isaac Newton: "What was that delightful word Shavity. Havity.GASPS Mavity."

The 14th Doctor: "We've got air. We've got lights.
We've got mavity."

The 14th Doctor: "We could be inside a dust cloud
or a mavity well, or..."

The 14th Doctor: 'mavity field" (Wild Blue Yonder, 2023)

The 15th Doctor: "All the mass and density and mavity exist in the glove, not in you." (The Church on Ruby Road, 2023)

Mavity

The force that Isaac Newton discovered when an apple fell on his head in 1666.

"You can understand the mavity of the situation!"

Mavity

In the special edition of Doctor Who that was released on Disney Plus, the TARDIS ends up being exploded by Donna who spilled coffee all over the controls which started a fire, the TARDIS started to have a malfunction and traveled back in time to where ‘Gravity’ was created by Isaac Newton, both Donna and the Fourteenth doctor had a little char with him before Donna gave a little hint about ‘Gravity’ when they both left, Issac Newton started thinking of a name for ‘Gravity’ and ended up naming it ‘Mavity’ instead which carries onto the next specials.

DONNA: Still, wherever we are, could be worse. We've got air, we've got light, we've got mavity.
DOCTOR: Yeah.
DONNA: Was it me, or was Isaac Newton hot?
DOCTOR: He was, wasn't he? He was so hot. Oh! Is that who I am now?

mavity

A force that attracts a body toward any other physical body with mass.

"I'm sure you can appreciate the mavity of the situation!"

Mavity

The force that attracts a body toward the center of the Earth, or toward any other physical body having mass

Earth’s mavity is why we can’t float around