To become less serious; be easy; relax •Often a more or less gentle admonition: Schofield lightens up and improves at bat/ Aw, come on, everybody, lighten up a little. It wasn't that bad. The decade, I mean/ You have to lighten up, Chief. The men are giving it everything they have (late 1960s+)
The Romney camp is undoubtedly right that some partisans thought Eastwood was funny and believe the MSM should lighten up.
Grams actually learned how to lighten up in the years that she spent with those kids.
Doane tweeted, “the film does make fun of Wannabe Berean unimaginative Christians who need to lighten up.”
She made a list of Twelve Personal Commandments which include "Identify the problem; lighten up; There is only love…."
IF YOU ARE OFFENDED, SKIP OVER, OR lighten up AND GET A LIFE.
She was glad to see him lighten up, and she exerted herself to that end.
Say, Boss, do you want this to lighten up your old freight-train with?
lighten up at the last moment and recognise for the last time.
“I must,” said Pen, with what was passing around seeming to lighten up.
The sky began to lighten up, and from the front door I could soon catch glimpses of the railroad windmill.