screwman
noun
screw·man
| \ -ümən\
plural screwmen
Definition of screwman
1
: one who passes metal through a rolling mill and reduces it to desired thickness by adjusting screws that regulate roller clearance
2
: one who helps to prepare the way for and to set up power shovels and cranes
— called also jackman
3
: one who loads bales of cotton onto a riverboat