under nose

under someone's nose

if something bad happens under your nose, it happens very close to you but you do not notice it. I'm amazed that it was going on right under his nose all that while and he didn't realize.

See also: nose

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under your nose

obvious or not hidden. Sorry it took me so long to see what was right under my nose.

Usage notes: also used in the plural form under your noses: She has been right under our noses all this time!Varies in the plural esp. as under the noses of sb, under their very noses, etc.--SL, 8/02

See also: nose