Empatucar un piso, ensuciar un piso (al caminar sobre él).

To track up a floor, to track on a floor.

Don't  come into the bedroom while I am mopping the floor. You will track it up.

In Modern Literature:

"It's no time to be tracking up her shiny floors."
Catching Fire by Suzanne Collins.

In Cartoons:

Hagar the Horrible

Hacer guardia (un vigilante, un soldado, un policia, un oficial, un funcionario...)

Foto: Diario Notitarde

To stand guard, tu guard something, to keep guard.

Do not worry. The police will stand guard over the door.

In News:

"The Old Guard guarded the tomb every minutw of every day since April 6, 1948. Today will be no exception."
Fox

"Tomb of the Unknown soldiers stand guard during Hurricane Sandy"
Fox

"Spc. Brett Hyde, Tomb Sentinel, 3rd U.S. Infantry Regiment (The Old Guard), keeps guard over the Tomb of the Unknown Soldier."
Fox

"A former Marine and father of two decided to help ease his daughter's fears after the tragic school shooting in Connecticut late last week by standing guard outside her west Nashville school."
News 2 ABC.

Habilitar un documento.

To expedite (the issuance of) a document.

You have to expedite your grades certification so that you can hand them in before Monday.

On Websites:

" By applying to expedite the passport application, you can get it processed within 3 weeks to as fast as the same day."
http://www.us-passport-service-guide.com/

"We can expedite passports in 24 hours!"
Passport Express.

In News:

"Russia has agreed to expedite the issuance of visas to EU citizens undergoing medical treatment at its clinics, Prime Minister Dmitry Medvedev said at a meeting on hi-tech medical aid development on Wednesday."
RAPSI 

Pagar para que un documento sea expedido en menos tiempo en inglés in English. 

Arrugar un papel o pedazo de papel (hacer bola/bollo un pedazo de papel)

To crumple up a piece of paper (into a ball)/to crumple a piece of paper (into a ball).

Sylvie crumpled up the letter and threw it in the bin.
Cambridge Dictionary Online.

Dan tore the page out, crumpled it, and threw it in the wastepaper basket.
Longman Dictionary online.

Why did you crumple up the bill?

Tomar fotos sin poses.

To take candid photos/snapshots, to take candids.

I prefer taking candid photos to posed ones.

On Websites:

" I generally prefer taking candid photos whenever possible, but I also like having a handful of posed photos of the whole family. It’s even better if everyone’s eyes are open and there’s a smile or two."

Gotta Mobile.

"Here are some tips for taking candid photos: Take your camera everywhere you go! Keep alert for candid situations - they can be found everywhere.

Cameras About.

Photo: digital-photography-school.com/11-tip

Navegar en Internet

Surf the Internet
I love surfing the Internet.

Reference from Cartoon: