A dirty spooner is usually a male, who tries to convince their victim, usually a female friend, that they wish to innocently spoon "as friends". The male then proceeds to awkwardly prod the female with his boner while acting like he is doing no such thing.
O-M-G, B-T-W, my friend Jordan, is a fuckin' dirty spooner. I was upset last night cause my boyfriend dumped me, and we were hanging out and I needed a cuddle buddy. Then he started fuckin' poking me with his thing and didn't even say anything. He just acted like he wasn't even doing anything.