Add a word, ruin a movie.

[throughgrittedteeth]

title stolen from twitter

Tropic Thunder Cunt

The Best of the Breast. (A Breastfeeders Guide)
Sorry, couldn't resist considering the site.

Unhappy feet

Pretty Ugly Woman

The Lost Boy's Football Kit.

Shaving private ryan

Bed and Breakfast at Tiffany's

Foot locker

Hunt for the red squirrel

The Sound of Next Door's Music.

Yami, I am well experienced with that film! (Previous neighbours)

The Full Monty Don

Jurassic Park and Ride

When Prince Harry met Sally
Love Hurts Actually

Heat Rash

The hunt for red lipstick

Spar Wars

Crimson Tights

The Devils Ad-vocado bathroom

The thin pantie line

Fuck is a four letter word

The Rescuers Down Under the Sink

One Rainy Day

Haha the butterfly chicken effect is the best one here...

Pencil Eraser

Pirates of the Caribbean jerk chicken

Hot bellybutton fuzz

The Oxo Cube

Gladiator sandals
Walk the Washing Line

Saving Ryan's Privates

Robin the bank in a Hood
Mary Poppins farts
Bedknobs, handcuffs and Broomsticks
Bridget Jones Diary of a callgirl
The 5:2 fast and the furious
Lock Jaws
Romeo and Juliet survive
Saw-ing wood

You're all brilliant! I would love to see some of these made into actual films

Brokeback Molehill

I can only think of one by changing not adding a word.

Harry Potter and the Pensioner of Azkaban.