either the pump or reservoir has been leaking and it's covered the underside of the car in grease (k-member, oil pan, frame, tranny...). whatever was leaking finally broke and there was fluid all over the floor.

can i use engine degreaser under the car and rinse it with the hose?

 

i'd try that, just do it quick
at the least hit it with some soap and water.

Mine leaked for a little while and sprayed all under the hood and ate the paint off, or turned it pink.

get to work NOW.

 

i agree remove it as soon as possible before it eats any paint...simple green would prolly work

 

Take a pair of rhino ramps with you to the spray car wash, pull the front up on them and go to town with the engine degreaser option. Just bring a towel to dry off the ramps before you put them back in the car.