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suck–up

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suck–up/ˈsʌkˌʌp/noun
pluralsuck–ups
suck–up
/ˈsʌkˌʌp/
noun
pluralsuck–ups
Learner's definition of SUCK–UP  
[count]US, informal + disapproving
: a person who tries to get the approval of someone in authority by saying and doing helpful and friendly things that are not sincere
— see also suck up at 1suck
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