An eccentric, strange or crazy person.
A boardsport participant who lacks style or skill; a newbie who acts as if they are better at the sport than they are.
Being in a healthy condition; not deranged; thinking rationally.
Mentally sound; possessing a rational mind; having the mental faculties in such condition as to be able to anticipate and judge the effect of one's actions in an ordinary manner.
Rational; reasonable; sensible.