Anthony Anderson Guards Against Swamp Ass

Anthony Anderson's totally down for alternative transportation, but he's definitely not down for sharing filthy bicycle seats with strangers.

The "Blackish" star was two-wheeling it through NYC on a Citi Bike when our photog manged to catch up with him, and ask about his approach to umm ... sweaty surfaces.

Anderson cracked a few jokes -- all while still riding -- but one thing he's dead serious about ... NOT riding dirty! Check out the clip.