1. lighten up - Verb
2. lighten up - Phrase
make more cheerful through the use of color
become more cheerful
make more cheerful
become lighter
Source: WordNetI think there comes a point where you have to grow up and get over yourself, lighten up...and forgive. Jennifer Aniston
Your attitude is like a box of crayons that color your world. Constantly color your picture gray, and your picture will always be bleak. Try adding some bright colors to the picture by including humor, and your picture begins to lighten up. Allen Klein
Zen teaches that once we can open up to the inevitability of our demise, we can begin to transform that situation and lighten up about it. Allen Klein
When times get tough, at some point, people instinctively know they need to lighten up in order to get through it. Allen Klein
... when you let go of your expectations, when you accept life as it is, you're free. To hold on is to be serious and uptight. To let go is to lighten up. Richard Carlson
Perhaps the soundest advice for parents is: Lighten up. People have been raising children for approximately as long as there have been people. George Will