Grass over
Definition 1 of 1
Pro Tip 1/3Secrecy Nuance
Indicates keeping a secret, usually about a wrongdoing that should be confidential. 
He chose to grass over the incident at work, maintaining team harmony.
Pro Tip 2/3Common Collocations
Often used with 'decide', 'try' or direct object 'something' to indicate the action of concealing. 
They tried to grass over the scandal but it eventually came out.
Pro Tip 3/3Metaphoric Sense
Metaphorically refers to covering something, much like grass growing over bare ground. 
She decided to grass over her mistakes instead of addressing them.