I've got butter fingers!!

At the moment I can not think of any idiom that really struck me when I was studying English. But I learnt one the other day that really got my attention: "to have butter fingers".Thank you Enric because you taught it to me!! I thought it was a funny expression because it describes me completely,mmm.... I sometimes have butter fingers and I get a spot of coffe on my clothes, or I drop my papers onto the floor...
Funny photos the ones today!