'To fight off a grin'

[Offroad]

Dear teachers

I can't find the meaning of the following sentence in read in any dictionary:

Arthur: Did they actually asked if you'd had killed someone?
Beca: Yes
Arthur fought off a grin.
Arthur: What did you say?
Beca: I said 'no', of course.

Thank you

 

[MikeNewYork]

Dear teachers

I can't find the meaning of the following sentence in read in any dictionary:

Arthur: Did they actually asked if you'd had killed someone?
Beca: Yes
Arthur fought off a grin.
Arthur: What did you say?
Beca: I said 'no', of course.

Thank you

It means he tried not to grin, probably because he didn't believe the accusation.

 

[charliedeut]

Arthur: Did they actually asked if you'd had killed someone?

Are you sure it was written like that in the dictionary, or is it your typo?

 

[Offroad]

too many 'had's