eep vs son of a gun

eep

• An expression of surprise or dismay. 

• A short scream or yelp. 

• To vocalise a short scream or yelp; to produce an eep. 

son of a gun

• Used to express anger, contempt, disgust, astonishment, disappointment, etc. 

• son of a bitch 

• Used encouragingly or to compliment