leecher
nounUK /ˈliːt͡ʃəː/ · CA, US /ˈlit͡ʃɚ/
Etymology From leech + -er.
1
One who leeches; a physician.
2
Internet One who downloads material without uploading in exchange.
3
Internet Any downloading peer in a BitTorrent swarm, regardless of whether that peer is uploading or not.