sloppinggerund / present participle Present participle used attributively to describe spilling or splashing
The slopping roof made it difficult to walk on.
Наклонная крыша затрудняла ходьбу по ней.
The slopping hill was easy to climb.
Пологий холм было легко взобраться.
Gerund/uncountable noun meaning the act of spilling or splashing liquid