| knave(villain, scourings, troublemaker) |
| knocked out(expression, collateral, subalternate, low-set) |
| lemon(lower, mediocre, substandard) |
| lousy(lower, mediocre, substandard) |
| low(collateral, subalternate, low-set) |
| low-grade(lower, mediocre, substandard) |
| low-hanging(collateral, subalternate, low-set) |
| low-lying(collateral, subalternate, low-set) |
| low-rent(lower, mediocre, substandard) |
| low-set(collateral, subalternate) |
| low man on totem pole(noun, expression, idiom, reserves) |
| lower rung(expression, collateral, subalternate, low-set) |
| lowlife(villain, scourings, troublemaker) |
| mean(lower, mediocre, substandard) |
| mediocre(lower, substandard) |
| middling(lower, mediocre, substandard) |
| minor-league(collateral, subalternate, low-set) |
| mischiefmaker(villain, scourings, troublemaker) |
| miscreant(villain, scourings, troublemaker) |
| neb(villain, scourings, troublemaker) |