The phrase "big boots" usually means someone who is in a position of authority or responsibility, often replacing someone else who held that position before. Full definition
However, this doesn't mean the Vauxhall has best - in - class practicality, with the sloping rear roofline going some way to explaining why some rivals (such as the Peugeot 508 SW and Mazda6 Tourer) have noticeably bigger boots in spite of being shorter. (carbuyer.co.uk)
But for me stepping back into the absurdly big boots of a COG soldier (former or not) was like coming home. (wolfsgamingblog.com)
Blundering in with big boots is likely to crush the sense of optimism. (schoolsweek.co.uk)