bumble through
To go about bunglingly, awkwardly, mindlessly, etc., during some task or in general. There are so many problems in the world, but people would rather bumble through than do anything to help change them. You got a D because you just bumbled through this paper without making any meaningful analysis of the text.
bumble through something
to get through something clumsily. I guess I will have to bumble through this speech again. Lily bumbled through her song and fled from the stage.