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cock

1 cock /ˈkɑːk/ noun
plural cocks
1 cock
/ˈkɑːk/
noun
plural cocks
Britannica Dictionary definition of COCK
[count]
: a device for stopping or slowing the flow of a liquid or gas through a pipe : stopcock
informal + impolite : penis

cock of the walk

◊ A man who is described as (the) cock of the walk is very proud and successful or acts in a very proud way.
2 cock /ˈkɑːk/ verb
cocks; cocked; cocking
2 cock
/ˈkɑːk/
verb
cocks; cocked; cocking
Britannica Dictionary definition of COCK
[+ object]
: to pull back the hammer of (a gun) to get ready to shoot
: to pull or bend back (something) to get ready to throw or hit a ball
: to turn, tip, or raise (part of your body or face) upward or to one side
◊ If you cock an ear/eye or cock your ear/eye, you listen to or look at someone or something with a lot of attention.
: to move (a hat) so that it is tilted on your head

cock a snook at

British, informal
: to show that you do not respect or value (something)

cock up

[phrasal verb] British, informal
: to make a mistake : to do something incorrectly
cock up (something) or cock (something) up : to make mistakes in doing or making (something)
see also cock-up
see also half-cocked