外行地，生手地

[ adv ]
in an amateurish manner
<adv.all>
he performed the piece amateurishly

Amateurish \Am`a*teur"ish\, a.
In the style of an amateur; superficial or defective like the
work of an amateur. -- {Am`a*teur"ish*ly}, adv. --
{Am`a*teur"ish*ness}, n.