Redfoo -- I'm In a Mankini, B*tch!

With his junk firmly tucked into a snug mankini, LMFAO frontman Redfoo ran around the beach in Australia this week ... in search of ... pants, maybe?

According to photographers on the scene, Red also knocked out some yoga on Bondi Beach while shooting a new ad for his clothing line.

Fun Fact -- In Australia, mankinis are referred to as "budgie smugglers."