Literally, a cat that is male. Also the subject of an Internet meme due to alleged differences in cats based on their gender.
"Boy cat" refers to a meme and belief that male cats are much more affectionate and friendly than female cats, who are believed to me more aloof and antisocial.
In Sentence: Babe can I come over for some Cooter Cat Therapy. Babe I'm feeling awesome after my C.C.T session yesterday evening, just what the doctor ordered.