goat

goat /ˈgoʊt/ noun
plural goats
goat
/ˈgoʊt/
noun
plural goats
Britannica Dictionary definition of GOAT
1 
[count] : a small animal that is related to the sheep
2 
the goat US : a person who is blamed for a loss or failure

get your goat

informal
◊ If something gets your goat, it upsets you or irritates you.

old goat

informal
— used as an insulting way to refer to an old man

separate the sheep from the goats

— see 1separate