You can pinch off a part of a loaf of bread, yes. So I would use "off" with the word pinch; however, the phrase in the question might be considered a 'colloquialism,' or local slang, as it is.
You can make a good sentence for the word pinch by using your imagination and thinking a good sentence up. Here are a few examples to get you started: Why did she pinch me? What did I ever do to her? I think she likes to pinch for attention. Ignore her.
I'll go and get ready. I'll be needing some bread and chocolate.
You go to Mousebreaker.com and when you get there play Pinch Hitter 2 then go to the bottom andtype in the cheat.
And
la baguette ("the stick") is the best-known loaf of French bread. It is expected to weigh 250 grams, and to have a nice crust. Bread is called 'pain' in French and has to be made only of flour, water, a pinch of salt and a pinch of yeast, but no more. Every variety of bread with added fat or preservatives, are called with a (slightly) different name, and are often disregarded by French people.
The Hypothesis uses ONE type of sentence. And this sentence is called the IF and THEN statement.E.g.:Problem: Which bread will mold faster White Bread or Wheat Bread?Hypothesis: If Wheat bread is placed in a cold temperature, then it will mold faster.THANK YOU ALL!
If you pinch your skin or flesh and a black bloody spot appears
The leprechauns are known to pinch. If you are not wearing green, traditionally, you will be (friendly/playfully) pinched. No harm in that, just don't go all out pinch crazy!
the bread was wholesome grain.
i ate sourdough bread,
We had an excess supply of bread.
I stole your bread.