A guy on a snowboard descends from the mountainsideA guy on a snowboard descends from the mountainside
The guy smiles in the photo studio under the lightingThe guy smiles in the photo studio under the lighting
A guy and a girl on the background of a sunset on the roofA guy and a girl on the background of a sunset on the roof
Юноша, молодой человек ( разг. ). Вообще употр. в знач. человек, мужчина ( прост. ).