uncle

uncle /ˈʌŋkəl/ noun
plural uncles
uncle
/ˈʌŋkəl/
noun
plural uncles
Britannica Dictionary definition of UNCLE
1 
[count] : the brother of your father or mother or the husband of your aunt
2 
US, informal — used as a word that you say when you are being hurt in a fight to show that you admit being defeated and do not want to continue fighting

and Bob's your uncle

— see bob