deadbeat

Short definition from Wiktionary

Noun

1. 1
   A lazy or irresponsible person who is often unemployed, often depending upon wealthy or otherwise financially independent people for support.
2. 2
   A person who defaults on debts.

Adjective

1. 1
   Having a damped needle that stops without oscillation.
2. 2
   Defaulting on one's debts.
3. 3
   Defeated or exhausted.
4. 4
   Lazy or irresponsible.
5. 5
   Dead tired.