door-to-door selling

　　a method of presenting and selling products or services in which a salesperson goes to the residences or homes of potential buyers, knocking on their doors to solicit business

　　EXAMPLE:

　　"Many homeowners dislike door-to-door selling and consider it to be disturbing to their privacy."

　　feasibility test

　　(noun)

　　a procedure or basis for evaluation or assessment to see if something is capable of being accomplished or brought about, or is possible

　　EXAMPLE:

　　"A business will often do a feasibility test on a product before spending money to market it to consumers."

　　feel the pinch

　　a financially difficult, tight, strained, or squeezed circumstance or situation

　　EXAMPLE:

　　"Experiencing little demand for its products, the company began to feel the pinch."

　　file thirteen

　　any container to discard or throw away unwanted paperwork; in an office setting a container for rubbish; the wastebasket

　　EXAMPLE:

　　"The salesperson crumpled the cancelled order and tossed it into file thirteen."

　　fat cat

　　a wealthy and privileged person

　　EXAMPLE:

　　"More than one fat cat has been seen visiting the offices of political candidates."

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