Thousands of protesters across the country have rallied against the Abbott government's budget in a vocal display of discontent at cuts to health and education.

As state and territory leaders attend an emergency meeting to discuss measures designed to cut $80 billion from health and education spending over the next four years, voters have voiced their anger under "March in May" banners in capital cities including Sydney, Melbourne and Brisbane.

The gatherings, a sequel to the "March in March" rally held earlier this year, were not limited to budget discontent.

Protesters also showed their objection to Prime Minister Tony Abbott's stance on human rights, environment and industrial relations.

Social media was awash with #marchinmay and #bustthebudget posts.