What it means
You say tip of the iceberg when the bit you've noticed is only the tiny visible slice of a much bigger mess. Usually it's bad news already, which means the hidden stuff is probably worse. Handy for scandals, office chaos, money problems, family rows, or any situation where one clue tells you there's a whole beast lurking underneath.
Usage examples
"Those dodgy invoices are just the tip of the iceberg, mate. If the auditors start digging, we’re in for a right mess, so brace yourself."
"These two complaints are just the tip of the iceberg, wait until you see the full inbox."
"The missing cash was only the tip of the iceberg, the whole account had been drained."
"Mate, that leaked email is just the tip of the iceberg. Give it a day and the whole grubby circus will come rolling out."
"We thought the late payments were the problem, but that was only the tip of the iceberg. The company's books are absolutely cursed."
Where it comes from
It comes from the literal iceberg image. Most of an iceberg sits hidden under the water, with only the top bit showing. English picked that up in the late 1800s as a clean way to say the visible problem is only the small, obvious part of something much bigger underneath.
