A person who is deficient.
Insufficient or inadequate in amount.
Lacking something essential; often construed with in.
Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n).
An ineffectual person.
Someone who shows off too much, a poser or poseur; someone who is overly self-satisfied.
A penis.
An annoying person.
An idiot, a stupid person.
A very informal address used between friends.
A person who wanks.