Tyre kicker

 

From Wiktionary:

English

Alternative forms

• (North America) tire kicker

Etymology

From the pointless act of kicking the tyres of a car as part of the inspection.

Noun

tyre kicker ‎(plural tyre kickers)

1. (idiomatic) A person who pretends to be interested in purchasing an item (especially a car), but who has no intention of buying it.