Four NSW Young Liberals have been kicked out of the party for making lewd and derogatory comments about women in an online chat group meant for election campaigning.

The four used the dating app Tinder to connect with women who they hoped to convince to vote Liberal and then made sexually explicit comments about them in a Facebook group.

In one instance, one of the Young Liberals who works for a senior NSW Liberal MP, posted a photo of a woman he was chatting with on Tinder, describing her as a “potato".

"A potato that can vote," the Young Liberal wrote.

“Then root and boot her and leave some HTVs (how to vote cards). F..k I could go some fries right now."