1. most bad-tempered, rude, and unfriendly (superlative form of surly)
Usage: superlative form

Examples

• He was the surliest customer the waiter had ever served.
• Even on her surliest days, she still helped her neighbors.
• The surliest guard at the prison rarely spoke to anyone.
• Of all the teenagers in the group, Jake was the surliest.
• The dog became surliest when strangers approached the house.
• She gave him her surliest look before storming out.