pusher in WordNet English dictionary

1. a small vehicle with four wheels in which a baby or child is pushed around
   baby buggy  baby carriage  carriage  perambulator  pram  stroller  go-cart  pushchair  pusher 
   
2. an unlicensed dealer in illegal drugs
   pusher  drug peddler  peddler  drug dealer  drug trafficker 
   
3. a sandal attached to the foot by a thong over the toes
   pusher  zori 
   
4. someone who pushes
   pusher  shover 
   
5. one who intrudes or pushes himself forward
   pusher  thruster