The shining's riveting climax where its revealed that all Jack Nicholson been typing all along  "too much work and no play makes Jack a dull boy"

Tom Hanks in Apollo 13 "Anyways, it was a successful failure"

There are so many witty lines in "Departed"

Among hindi movies: these three dialogues were prevalent in all movies at the time:

1. Main tumhari bache ki Maa banne wali hoon. - Actress to the Actor/Villain

2. Bhagwan, aaj tak maine tujhse kuch nai maga. *Rings the bell* and a flower drops or sometimes the statue itself takes action

3. Aapke daulat aapko mubarak ho. Usually young actors/actresses to their parents/inlaws :)