What does "bug" mean?

See bug in WNW Idioms

bug off

☆
Slang to stop annoying someone and leave
also Brit.bugger off

bug out

☆
Slang to run away; desert

See bug in American Heritage Dictionary 4 Idioms

put a bug in (someone's) ear

Informal
To impart useful information to (another) in a subtle, discreet way.

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