We introduce a fully-coated slippery semi-circular cylinder in a uniform flow and studied the physics of the same. To mimic the hydrophobic condition on the semi-circular cylinder Navier-slip modeling is employed. Finite Element Analysis(FEM) has been used to solve the momentum and continuity equations. The study has been validated for a circular cylinder with slip implementation with the available studies and was found satisfactory. Four flow velocities (Re \(= 50,100,150,200\) ) have been employed and three slip lengths ( \(\beta '\) = 0,0.05,0.1) have been applied to the cylinder walls to make it slippery. The hydrodynamic parameters under investigation are the coefficient of lift, coefficient of drag, and Strouhal number. As the wall slip increases, a slight decrease in lift coefficient is noted while a significant drop in drag coefficient is observed. An increase in Re caused a rise in both coefficient values. An increased shedding frequency was observed at higher slip lengths and with an increase in flow velocity and is indicated by the Strouhal number. The objectives of the study were well addressed by the designed parametric study and the performance characteristics of the fully coating had been analyzed. The numerical study performed was able to provide a reflection of the physical phenomenon in the simplest manner.