Redlining

[Tina]

Running a piece of equipment, most often an engine or other powerplant, way beyond its rated maximum, usually in an emergency situation.
Usually, denoted by taking the engine revs or temperature up into the red area on an indicator dial, risking permanent damage or catastrophic failure.

[Luis Fok]

when a girl has her period.

[Kai]

From redline -
Pronunciation: red-lIn
Function : verb
: redline, to redline, also redlining; to engage in sexual intercourse at an extremely rapid tempo.

Origin in redline : a recommended safety limit; the fastest, farthest, or highest point or degree considered safe.

[Donald Trump]

This term is used for have sex

[Hina Muqadas]

the practice of refusing to lend money, give mortgages ,or sell home insurance to people living in poor areas, or of charging them high rates for this: