Idiot who's always on his mobile (cell phone).

to tell someone to calm down and relax.

Is when you are on the phone with your girlfriend or boyfriend ( If you swing that way ) and you slap your dick on the mouthpiece of your mobile phone. This usually makes a loud thumping sound that the other party hears.

Standing in the men's room, using one hand to hold the phone, the other to hold your dick.