splodge

läikkä, laikku, läiskä An irregular-shaped splash, smear, or patch.
2007, Anne Mustoe, Che Guevara and the Mountain of Silver: By Bicycle and Train Through South America, Virgin Books (2007), ISBN 9780753512746, http://books.google.com/books?id=Pdw4r1OmDSQC&pg=PA155&dq=%22splodge%22 page 155:

It was a strip of absolute desert, where the only vegetation was the occasional splodge of moss, which lay over the sand edging of the salt flats like livid green cowpats.

The consequence was that the stupid girl now had ended up with a bright blue ink splodge on her white “see through” blouse (�)

The 'rainbows' we had seen in the cockpit were two bright round splodges of light called sun dogs, one either side of the sun, joined together by a golden ring of light.