good arm, custard

What you say shout when someone fails to catch an item you throw to them, like keys, balls, a small bag etc.

The arm equivalent of 'Spaghetti Legs'; someone with ‘Custard Arms'.

Person 1: ‘Go Long!’ *throws item*
Person 2: *catches, and tries to hold onto it before dropping it.*
Person 1: ‘Good arm, Custard!’