Phillip "Lip" Gallagher

Phillip "Lip" Ronan Gallagher aged 23, is the second Gallagher child and is the most academically minded. In high school he was a straight-A student. He created various money-making schemes to help the Gallagher clan survive, such as running an ice cream truck that also sold beer and marijuana. He also made money by taking the SATs for fellow students for a fee, but had to stop when he was caught by Professor Hearst, an investigator from the Educational Evaluation Service. After testing Lip in private, Hearst discovers Lip is one of the statistically very rare students capable of achieving a perfect SAT score and offers him an internship at the robotics lab at the University of Chicago, which Lip turns down. Hearst gets Lip in trouble with his past clients by invalidating all of their SAT scores, since they didn't actually take the tests themselves. In addition to being adept scientifically, Lip like his father is multilingual; in season 2 he exhibits knowledge of Portuguese and Italian and in season 4 he speaks Spanish.