they; those guys; those bastards
Casual plural pronoun based on 奴; often dismissive, contemptuous, or hostile. Use for people the speaker feels distance from or looks down on, not for respectful reference.
Those guys were late again.
Let's get out before they find us.
あいつら points at people who feel distant or separate from the speaker, whereas 奴ら focuses more on looking down on or scorning them.
連中 refers to a group or gang in a casual, sometimes mildly negative way, but it is less personally insulting than 奴ら.
野郎ども is a rougher, more explicitly male-directed insult than 奴ら, which can refer to any group the speaker scorns.
奴ら is a rough, colloquial way to refer to a group of people, while 輩 is a bit more literary and can appear in formal writing too.
Common mixed kanji-kana spelling; this form is high priority.
Fully kanji spelling with 等 for the plural suffix; understandable but more kanji-heavy than 奴ら.
Formed from 奴（やつ）, a casual and often derogatory word for a person or thing, plus the plural suffix ら. The spelling 奴 is conventionally associated with this rough, dismissive nuance.