Shirker
/ˈʃɜːrkər/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
The word 'shirker' suggests a negative judgment about someone's work ethic. 
He's seen as a shirker by his colleagues for always avoiding overtime.
Pro Tip 2/3Behavior Pattern
'Shirker' often implies a regular, consistent behavior rather than a one-time occurrence. 
Sarah isn't a shirker; she just missed one deadline due to illness.
Pro Tip 3/3Informal Label
'Shirker' is informal and could be disrespectful if used in formal or serious situations. 
In the performance review, the manager avoided calling Tom a shirker, despite his poor track record.