drop out

动词

To leave (school, a race, etc.) prematurely and voluntarily. · Nothing went well in high school, so he dropped out.
To opt out of conventional society.
To be lost or momentarily interrupted. · I can't make phone calls because the line keeps dropping out.
Used other than figuratively or idiomatically: see drop, out.
To give way under someone. (intransitive) · The board he was walking on dropped out.
To cause someone to slip and/or fall down. (figuratively, intransitive) · The ground dropped out from under him.· When she left him, his world dropped out beneath him.
To dismiss, break up with or abandon (someone). (slang, transitive)

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