пачкотня́

nounfeminineinanimateuncountablevery rarely used (#44447)

1.
scribbling, scrawl, daub, smearing
На стене какая-то пачкотня́, а не рису́нок.
There is some scrawl on the wall rather than a drawing.
Colloquial and disparaging; refers to the messy result as well as the activity.
2.
bungling, botched work, hack work
Э́то не карти́на, а пачкотня́.
This is not a painting but botched work.
Colloquial and disparaging, of clumsy or incompetent work.

Examples

Хватит заниматься этой пачкотнёй на стенах!
Stop scribbling all over the walls!
Учитель назвал его рисунок обычной пачкотнёй.
The teacher called his drawing mere scribbling.
Это не картина, а просто пачкотня.
This isn't a painting; it's just a mess of scribbles.