IPA: /ˌʌnˈpɑːlɪˌmɛntəri/
KK: /ʌnˈpɑːrlɪˌmɛnˌtɛri/
Not following the rules or accepted practices of a parliamentary system.
The speaker ruled the comment as unparliamentary and asked the member to retract it.
Unparliamentary → It is formed from "un-" (meaning not) and "parliamentary" (from Old French *parlementaire*, meaning relating to a parliament). The word describes something that is not in accordance with the rules or decorum of parliamentary procedure.
Think of 'not' ('un-') following the rules of a 'parliament' — that's why 'unparliamentary' means not following parliamentary rules.