G.I.M.P. stands for Get In My Pants. used for people who are horny or could be used if you think somebody is hot and you're like woah GIMP. could be used in different terms, such as, gimp (noun), gimpster (adjective), or gimpy (adjective)
sara: hey i'm sara
charley: *thinks to himself* daaammnn GIMP...*says outloud* hey i'm charley ;)
girl: hey let's go do something fun
boy: take of your clothes, i'm really gimpy right now.