white-bread-box

1. A typing of Caucasians as individuals not qualified to dance well, jump high, sing soulfully, or generally relate to the human experience of anyone not Caucasian.

2. A racist device used to perpetuate the above type of Caucasians.

Hank: Poor Jimmy's havin' a heck of a time getting that Breakdancing scholarship...
Hal: He just can't seem to break out of that white-bread-box.