2 words and a much under-rated form of reward.
Not often heard in the UK these days where it has died out or other forms of gratitude are in more common usage:
- In the Office: At appraisal time rather than hearing a heart felt thank you and pay rise/bonus for all your hard work over the year, you are more likely to hear Think yourself lucky you still have a job!
- On the Street: Once commonly heard when doors were held open for fellow pedestrians, now no longer heard unless preceded with epithet and/or sarcastic tone of voice.
- In The 'Hood: Has evolved into a form of para-military gratitude i.e. Respect man or I'll slash your throat
- On the Road: No longer heard/seen at all.