To ease up; back off; slow down. "Lighten up," said the boss to his co-workers. "Harold is a new employee."
see more »
LIGATIA - LIGBC - LIGHT - Light In the Loafers - LIGHTEN - LightRail - LIGI - LIGIE - LIGO - LIH
"LIGHTEN UP." Abbreviations.com. STANDS4 LLC, 2016. Web. 9 Dec. 2016. <http://www.abbreviations.com/LIGHTEN%20UP>.