Translation of "Nerd" in English

Tomás es un verdadero nerd.

Tom is a real nerd.

O porque soy un nerd, o porque tengo poco autocontrol,

or because I'm a nerd, or I have a low level of self-control,

Y te lo digo yo, un nerd de nivel 17,

And take it from me, a 17th-level nerd,