toss off toss off /ˈtɒs ˈɒf/

verb

1. [Informal] Drink down entirely  ( belt down [Informal] , bolt down [Informal] , drink down , down [Informal] , kill [Informal] , pop [Informal] , pour down , toss off [Informal] )
   drink down entirely
    He downed three martinis before dinner
   He downed three martinis before dinner
    She killed a bottle of brandy that night
   She killed a bottle of brandy that night
    They popped a few beer after work
   They popped a few beer after work
   
2. [Informal] Write quickly  ( dash off , fling off , knock off [Informal] , scratch off , toss off [Informal] )
   write quickly
    She dashed off a note to her husband saying she would not be home for supper
   She dashed off a note to her husband saying she would not be home for supper
    He scratched off a thank-you note to the hostess
   He scratched off a thank-you note to the hostess