it means give your girlfriend your cock, and make her suck it realhard
person1: im gona give the dog a bone tonight
person2: like we all needed to know m8 person1: youve done it havent u
person2: ye
person1: exactly u told me you were gona do it
When a man is being berated by his significant other and taking it like a champ, then his significant other realizes she is being ridiculous. So, she apologizes with sex.
"You need to quit being so harsh on Tony; throw that dog a bone!"