noun
    
    plural screws
    
    [count] a narrow, pointed metal cylinder that has a wide flat or rounded top and a ridge (called a thread) that goes around it in a spiral
    
    A screw is used to hold things together or to attach things. It is inserted into wood, metal, etc., by being turned.
    
    
    
    an object that has a thread like a screw which is used to attach or connect it to something - usually used before another noun
    
    
    
    informal + offensive
    
    an act of sexual intercourse
    
    a sexual partner
    
    slang :a prison guard
    
    have a screw loose
    
    or have a loose screw
    
    informal :to be crazy
    
    
    
    
    
    put the screws on/to (someone or something)
    
    informal :to use force or the threat of force to make (someone or something) do what you want
    
    
    
    tighten the screws
    
    informal :to put more pressure on someone or something to do something
    
    
    
    verb
    
    screws; screwed; screwing
    
    always followed by an adverb or preposition [+ obj] :to attach (something) with a screw
    
    
    
    
    
    always followed by an adverb or preposition
    
    [+ obj] :to turn (something) so that it attaches or connects to something
    
    
    
    
    
    [no obj] :to fit onto or into something by being turned
    
    
    
    
    
    informal + offensive
    
    [no obj] :to have sex
    
    [+ obj] :to have sex with (someone)
    
    [+ obj] informal
    
    to take something from (someone) by lying or breaking a rule
    
    
    
    
    
    to prevent (someone) from having or getting something that is deserved or expected
    
    
    
    
    
    
    
    [+ obj] informal + impolite - used to express anger, disgust, etc.
    
    
    
    
    
    [+ obj] :to press or squeeze (something) so that it is no longer flat or smooth - often + up
    
    
    
    have/get your head screwed on right/straight
    
    
    
    screw around
    
    [phrasal verb] chiefly US informal
    
    to do things that are not useful or serious :to waste time
    
    
    
    to have sex with someone who is not your husband, wife, or regular partner
    
    
    
    
    
    to use or do something in a way that is not very serious
    
    
    
    
    
    screw around with (something) :to handle or play with (something) in a careless or foolish way
    
    
    
    screw up
    
    [phrasal verb] informal
    
    to make a mistake :to do something incorrectly
    
    
    
    
    
    b screw (something) up or screw up (something) :to make a mistake in (something)
    
    
    
    
    
    screw (something) up or screw up (something) :to damage or ruin (something)
    
    
    
    
    
    screw (someone) up or screw up (someone) :to make (someone) very upset and unhappy for a long time
    
    
    
    screw (something) up or screw up (something) :to tighten the muscles of (your face or eyes)
    
    
    
    
    
    screw up the/your courage :to make yourself brave enough to do something difficult