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fuck

1 fuck /ˈfʌk/ verb
fucks; fucked; fucking
1 fuck
/ˈfʌk/
verb
fucks; fucked; fucking
Britannica Dictionary definition of FUCK
Fuck is an extremely offensive word in all of its uses and should be avoided.
offensive + obscene
[no object] : to have sex
[+ object] : to have sex with (someone)
[+ object] offensive : to cheat or mistreat (someone)
offensive used to express anger, disgust, etc.

fuck off

[phrasal verb] offensive
used as an angry command to tell someone to go away

fuck up

[phrasal verb] offensive
: to act stupidly : to make mistakes
fuck up (something) or fuck (something) up : to ruin (something) by being stupid or careless
fuck up (someone) or fuck (someone) up : to cause (someone) to become confused, crazy, etc.

fuck with

[phrasal verb] offensive
fuck with (something) : to handle (something) carelessly : to mess with (something)
fuck with (someone) : to treat (someone) wrongly : to mess with (someone)
2 fuck /ˈfʌk/ noun
plural fucks
2 fuck
/ˈfʌk/
noun
plural fucks
Britannica Dictionary definition of FUCK
[count] offensive + obscene : an act of sexual intercourse
[count] offensive + obscene : a sexual partner
offensive
[singular] : anything at all usually used in negative statements
[noncount] used with the as a way to make an angry statement or question more forceful