Jonnymanson means in slang: One man who fits in all or most of these categories. He is a worthless, spineless man. A man who exploits the insecurities and sexual desires of girls for his own pleasure; acting upon a girl’s emotional or physical insecurity. Referring to the previous, one who maintains a relationship solely to get his partner sexually through any means necessary to lie about living with her He cheats on his girlfriend and she stupidly believes he is the one who did it. Guy and a little ****. (in Slang Dictionary, added by Evaristo Hidalgo)