Pronounced: Eye-ehch-tee-gee. Acronym for "I Hate That Guy". Used in a business context to refer to nincompoops or others who just do not have a clue. The acronym allows the user to refer to said individual with little chance of knowledge of who you are referring to.
"IHTG, when is he going to figure out how things work here?" or, "I had a meeting with IHTG, and I am still recovering. He didn't get anything done on his deliverables."