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."