Present tense contraction for "intramuscular" IM; as opposed to IV (intravenous) or SL (sublingual) : In reference to drugs and medications; a route of administration.
When you arebored and have no friends, so you start a chat with yourself.
benjabean1: hello
benjabean1: hello
benjabean1: how are you?
benjabean1: how are you?
benjabean1: fine thanks, how are you?
benjabean1: fine thanks, how are you?
Person walks by, looks at screen, "Dude, stop iming yourself!"